diff --git a/scripts/generate.sh b/scripts/generate.sh
index 4a0d5237..90e9d983 100755
--- a/scripts/generate.sh
+++ b/scripts/generate.sh
@@ -58,10 +58,10 @@ fi
 (
   # Model file fix
   if [ "$platform" = "Darwin" ]; then
-    sed -i '' 's/public function setData(RawDeviceAttributesResult $data): self/public function setData(array $data): self/' ./src/Model/SignalResponseRawDeviceAttributes.php
+    sed -i '' 's/public function setData(?RawDeviceAttributesResult $data): self/public function setData(?array $data): self/' ./src/Model/SignalResponseRawDeviceAttributes.php
     sed -i '' 's/public function getData(): ?RawDeviceAttributesResult/public function getData(): array/' ./src/Model/SignalResponseRawDeviceAttributes.php
   else
-    sed -i 's/public function setData(RawDeviceAttributesResult $data): self/public function setData(array $data): self/' ./src/Model/SignalResponseRawDeviceAttributes.php
+    sed -i 's/public function setData(?RawDeviceAttributesResult $data): self/public function setData(?array $data): self/' ./src/Model/SignalResponseRawDeviceAttributes.php
     sed -i 's/public function getData(): ?RawDeviceAttributesResult/public function getData(): array/' ./src/Model/SignalResponseRawDeviceAttributes.php
   fi
 )
diff --git a/src/Model/ASN.php b/src/Model/ASN.php
index 216f7923..3cdd4601 100644
--- a/src/Model/ASN.php
+++ b/src/Model/ASN.php
@@ -269,7 +269,7 @@ public function getName(): ?string
      *
      * @return $this
      */
-    public function setName(string $name): self
+    public function setName(?string $name): self
     {
         $this->container['name'] = $name;
 
diff --git a/src/Model/BotdDetectionResult.php b/src/Model/BotdDetectionResult.php
index bc2c4524..89ef69c4 100644
--- a/src/Model/BotdDetectionResult.php
+++ b/src/Model/BotdDetectionResult.php
@@ -273,7 +273,7 @@ public function getType(): ?string
      *
      * @return $this
      */
-    public function setType(string $type): self
+    public function setType(?string $type): self
     {
         $this->container['type'] = $type;
 
diff --git a/src/Model/BotdResult.php b/src/Model/BotdResult.php
index a5d0ccf6..871ca617 100644
--- a/src/Model/BotdResult.php
+++ b/src/Model/BotdResult.php
@@ -373,7 +373,7 @@ public function getLinkedId(): ?string
      *
      * @return $this
      */
-    public function setLinkedId(string $linked_id): self
+    public function setLinkedId(?string $linked_id): self
     {
         $this->container['linked_id'] = $linked_id;
 
diff --git a/src/Model/BrowserDetails.php b/src/Model/BrowserDetails.php
index e5190554..ce20254f 100644
--- a/src/Model/BrowserDetails.php
+++ b/src/Model/BrowserDetails.php
@@ -424,7 +424,7 @@ public function getBotProbability(): ?int
      *
      * @return $this
      */
-    public function setBotProbability(int $bot_probability): self
+    public function setBotProbability(?int $bot_probability): self
     {
         $this->container['bot_probability'] = $bot_probability;
 
diff --git a/src/Model/DataCenter.php b/src/Model/DataCenter.php
index d3f65818..a817ca57 100644
--- a/src/Model/DataCenter.php
+++ b/src/Model/DataCenter.php
@@ -238,7 +238,7 @@ public function getName(): ?string
      *
      * @return $this
      */
-    public function setName(string $name): self
+    public function setName(?string $name): self
     {
         $this->container['name'] = $name;
 
diff --git a/src/Model/DeprecatedIPLocation.php b/src/Model/DeprecatedIPLocation.php
index ec436a63..78062c3e 100644
--- a/src/Model/DeprecatedIPLocation.php
+++ b/src/Model/DeprecatedIPLocation.php
@@ -254,7 +254,7 @@ public function getAccuracyRadius(): ?int
      *
      * @return $this
      */
-    public function setAccuracyRadius(int $accuracy_radius): self
+    public function setAccuracyRadius(?int $accuracy_radius): self
     {
         $this->container['accuracy_radius'] = $accuracy_radius;
 
@@ -276,7 +276,7 @@ public function getLatitude(): ?float
      *
      * @return $this
      */
-    public function setLatitude(float $latitude): self
+    public function setLatitude(?float $latitude): self
     {
         $this->container['latitude'] = $latitude;
 
@@ -298,7 +298,7 @@ public function getLongitude(): ?float
      *
      * @return $this
      */
-    public function setLongitude(float $longitude): self
+    public function setLongitude(?float $longitude): self
     {
         $this->container['longitude'] = $longitude;
 
@@ -320,7 +320,7 @@ public function getPostalCode(): ?string
      *
      * @return $this
      */
-    public function setPostalCode(string $postal_code): self
+    public function setPostalCode(?string $postal_code): self
     {
         $this->container['postal_code'] = $postal_code;
 
@@ -342,7 +342,7 @@ public function getTimezone(): ?string
      *
      * @return $this
      */
-    public function setTimezone(string $timezone): self
+    public function setTimezone(?string $timezone): self
     {
         $this->container['timezone'] = $timezone;
 
@@ -364,7 +364,7 @@ public function getCity(): ?DeprecatedIPLocationCity
      *
      * @return $this
      */
-    public function setCity(DeprecatedIPLocationCity $city): self
+    public function setCity(?DeprecatedIPLocationCity $city): self
     {
         $this->container['city'] = $city;
 
@@ -386,7 +386,7 @@ public function getCountry(): ?Location
      *
      * @return $this
      */
-    public function setCountry(Location $country): self
+    public function setCountry(?Location $country): self
     {
         $this->container['country'] = $country;
 
@@ -408,7 +408,7 @@ public function getContinent(): ?Location
      *
      * @return $this
      */
-    public function setContinent(Location $continent): self
+    public function setContinent(?Location $continent): self
     {
         $this->container['continent'] = $continent;
 
@@ -432,7 +432,7 @@ public function getSubdivisions(): ?array
      *
      * @return $this
      */
-    public function setSubdivisions(array $subdivisions): self
+    public function setSubdivisions(?array $subdivisions): self
     {
         $this->container['subdivisions'] = $subdivisions;
 
diff --git a/src/Model/DeprecatedIPLocationCity.php b/src/Model/DeprecatedIPLocationCity.php
index 9a1b4416..8374fd5a 100644
--- a/src/Model/DeprecatedIPLocationCity.php
+++ b/src/Model/DeprecatedIPLocationCity.php
@@ -204,7 +204,7 @@ public function getName(): ?string
      *
      * @return $this
      */
-    public function setName(string $name): self
+    public function setName(?string $name): self
     {
         $this->container['name'] = $name;
 
diff --git a/src/Model/ErrorEvent403Response.php b/src/Model/ErrorEvent403Response.php
index 7a1bc6d0..f4922f99 100644
--- a/src/Model/ErrorEvent403Response.php
+++ b/src/Model/ErrorEvent403Response.php
@@ -204,7 +204,7 @@ public function getError(): ?ErrorEvent403ResponseError
      *
      * @return $this
      */
-    public function setError(ErrorEvent403ResponseError $error): self
+    public function setError(?ErrorEvent403ResponseError $error): self
     {
         $this->container['error'] = $error;
 
diff --git a/src/Model/ErrorEvent404Response.php b/src/Model/ErrorEvent404Response.php
index b6be0ba3..247baa79 100644
--- a/src/Model/ErrorEvent404Response.php
+++ b/src/Model/ErrorEvent404Response.php
@@ -204,7 +204,7 @@ public function getError(): ?ErrorEvent404ResponseError
      *
      * @return $this
      */
-    public function setError(ErrorEvent404ResponseError $error): self
+    public function setError(?ErrorEvent404ResponseError $error): self
     {
         $this->container['error'] = $error;
 
diff --git a/src/Model/EventResponse.php b/src/Model/EventResponse.php
index cceb4a49..d167078e 100644
--- a/src/Model/EventResponse.php
+++ b/src/Model/EventResponse.php
@@ -240,7 +240,7 @@ public function getError(): ?ProductError
      *
      * @return $this
      */
-    public function setError(ProductError $error): self
+    public function setError(?ProductError $error): self
     {
         $this->container['error'] = $error;
 
diff --git a/src/Model/HighActivityResult.php b/src/Model/HighActivityResult.php
index 503dc337..9c0a4201 100644
--- a/src/Model/HighActivityResult.php
+++ b/src/Model/HighActivityResult.php
@@ -238,7 +238,7 @@ public function getDailyRequests(): ?float
      *
      * @return $this
      */
-    public function setDailyRequests(float $daily_requests): self
+    public function setDailyRequests(?float $daily_requests): self
     {
         $this->container['daily_requests'] = $daily_requests;
 
diff --git a/src/Model/IPLocation.php b/src/Model/IPLocation.php
index a292b156..617effab 100644
--- a/src/Model/IPLocation.php
+++ b/src/Model/IPLocation.php
@@ -252,7 +252,7 @@ public function getAccuracyRadius(): ?int
      *
      * @return $this
      */
-    public function setAccuracyRadius(int $accuracy_radius): self
+    public function setAccuracyRadius(?int $accuracy_radius): self
     {
         $this->container['accuracy_radius'] = $accuracy_radius;
 
@@ -274,7 +274,7 @@ public function getLatitude(): ?float
      *
      * @return $this
      */
-    public function setLatitude(float $latitude): self
+    public function setLatitude(?float $latitude): self
     {
         $this->container['latitude'] = $latitude;
 
@@ -296,7 +296,7 @@ public function getLongitude(): ?float
      *
      * @return $this
      */
-    public function setLongitude(float $longitude): self
+    public function setLongitude(?float $longitude): self
     {
         $this->container['longitude'] = $longitude;
 
@@ -318,7 +318,7 @@ public function getPostalCode(): ?string
      *
      * @return $this
      */
-    public function setPostalCode(string $postal_code): self
+    public function setPostalCode(?string $postal_code): self
     {
         $this->container['postal_code'] = $postal_code;
 
@@ -340,7 +340,7 @@ public function getTimezone(): ?string
      *
      * @return $this
      */
-    public function setTimezone(string $timezone): self
+    public function setTimezone(?string $timezone): self
     {
         $this->container['timezone'] = $timezone;
 
@@ -362,7 +362,7 @@ public function getCity(): ?IPLocationCity
      *
      * @return $this
      */
-    public function setCity(IPLocationCity $city): self
+    public function setCity(?IPLocationCity $city): self
     {
         $this->container['city'] = $city;
 
@@ -384,7 +384,7 @@ public function getCountry(): ?Location
      *
      * @return $this
      */
-    public function setCountry(Location $country): self
+    public function setCountry(?Location $country): self
     {
         $this->container['country'] = $country;
 
@@ -406,7 +406,7 @@ public function getContinent(): ?Location
      *
      * @return $this
      */
-    public function setContinent(Location $continent): self
+    public function setContinent(?Location $continent): self
     {
         $this->container['continent'] = $continent;
 
@@ -430,7 +430,7 @@ public function getSubdivisions(): ?array
      *
      * @return $this
      */
-    public function setSubdivisions(array $subdivisions): self
+    public function setSubdivisions(?array $subdivisions): self
     {
         $this->container['subdivisions'] = $subdivisions;
 
diff --git a/src/Model/IPLocationCity.php b/src/Model/IPLocationCity.php
index b9e2adc6..10899728 100644
--- a/src/Model/IPLocationCity.php
+++ b/src/Model/IPLocationCity.php
@@ -204,7 +204,7 @@ public function getName(): ?string
      *
      * @return $this
      */
-    public function setName(string $name): self
+    public function setName(?string $name): self
     {
         $this->container['name'] = $name;
 
diff --git a/src/Model/IpInfoResult.php b/src/Model/IpInfoResult.php
index e2d8919c..3eee0292 100644
--- a/src/Model/IpInfoResult.php
+++ b/src/Model/IpInfoResult.php
@@ -212,7 +212,7 @@ public function getV4(): ?IpInfoResultV4
      *
      * @return $this
      */
-    public function setV4(IpInfoResultV4 $v4): self
+    public function setV4(?IpInfoResultV4 $v4): self
     {
         $this->container['v4'] = $v4;
 
@@ -234,7 +234,7 @@ public function getV6(): ?IpInfoResultV6
      *
      * @return $this
      */
-    public function setV6(IpInfoResultV6 $v6): self
+    public function setV6(?IpInfoResultV6 $v6): self
     {
         $this->container['v6'] = $v6;
 
diff --git a/src/Model/IpInfoResultV4.php b/src/Model/IpInfoResultV4.php
index e78f3f23..4c32dff8 100644
--- a/src/Model/IpInfoResultV4.php
+++ b/src/Model/IpInfoResultV4.php
@@ -275,7 +275,7 @@ public function getAsn(): ?ASN
      *
      * @return $this
      */
-    public function setAsn(ASN $asn): self
+    public function setAsn(?ASN $asn): self
     {
         $this->container['asn'] = $asn;
 
@@ -297,7 +297,7 @@ public function getDatacenter(): ?DataCenter
      *
      * @return $this
      */
-    public function setDatacenter(DataCenter $datacenter): self
+    public function setDatacenter(?DataCenter $datacenter): self
     {
         $this->container['datacenter'] = $datacenter;
 
diff --git a/src/Model/IpInfoResultV6.php b/src/Model/IpInfoResultV6.php
index e19214f2..808ec4be 100644
--- a/src/Model/IpInfoResultV6.php
+++ b/src/Model/IpInfoResultV6.php
@@ -275,7 +275,7 @@ public function getAsn(): ?ASN
      *
      * @return $this
      */
-    public function setAsn(ASN $asn): self
+    public function setAsn(?ASN $asn): self
     {
         $this->container['asn'] = $asn;
 
@@ -297,7 +297,7 @@ public function getDatacenter(): ?DataCenter
      *
      * @return $this
      */
-    public function setDatacenter(DataCenter $datacenter): self
+    public function setDatacenter(?DataCenter $datacenter): self
     {
         $this->container['datacenter'] = $datacenter;
 
diff --git a/src/Model/ProductsResponse.php b/src/Model/ProductsResponse.php
index 1a368e31..d2526c91 100644
--- a/src/Model/ProductsResponse.php
+++ b/src/Model/ProductsResponse.php
@@ -326,7 +326,7 @@ public function getIdentification(): ?ProductsResponseIdentification
      *
      * @return $this
      */
-    public function setIdentification(ProductsResponseIdentification $identification): self
+    public function setIdentification(?ProductsResponseIdentification $identification): self
     {
         $this->container['identification'] = $identification;
 
@@ -348,7 +348,7 @@ public function getBotd(): ?ProductsResponseBotd
      *
      * @return $this
      */
-    public function setBotd(ProductsResponseBotd $botd): self
+    public function setBotd(?ProductsResponseBotd $botd): self
     {
         $this->container['botd'] = $botd;
 
@@ -370,7 +370,7 @@ public function getIpInfo(): ?SignalResponseIpInfo
      *
      * @return $this
      */
-    public function setIpInfo(SignalResponseIpInfo $ip_info): self
+    public function setIpInfo(?SignalResponseIpInfo $ip_info): self
     {
         $this->container['ip_info'] = $ip_info;
 
@@ -392,7 +392,7 @@ public function getIncognito(): ?SignalResponseIncognito
      *
      * @return $this
      */
-    public function setIncognito(SignalResponseIncognito $incognito): self
+    public function setIncognito(?SignalResponseIncognito $incognito): self
     {
         $this->container['incognito'] = $incognito;
 
@@ -414,7 +414,7 @@ public function getRootApps(): ?SignalResponseRootApps
      *
      * @return $this
      */
-    public function setRootApps(SignalResponseRootApps $root_apps): self
+    public function setRootApps(?SignalResponseRootApps $root_apps): self
     {
         $this->container['root_apps'] = $root_apps;
 
@@ -436,7 +436,7 @@ public function getEmulator(): ?SignalResponseEmulator
      *
      * @return $this
      */
-    public function setEmulator(SignalResponseEmulator $emulator): self
+    public function setEmulator(?SignalResponseEmulator $emulator): self
     {
         $this->container['emulator'] = $emulator;
 
@@ -458,7 +458,7 @@ public function getClonedApp(): ?SignalResponseClonedApp
      *
      * @return $this
      */
-    public function setClonedApp(SignalResponseClonedApp $cloned_app): self
+    public function setClonedApp(?SignalResponseClonedApp $cloned_app): self
     {
         $this->container['cloned_app'] = $cloned_app;
 
@@ -480,7 +480,7 @@ public function getFactoryReset(): ?SignalResponseFactoryReset
      *
      * @return $this
      */
-    public function setFactoryReset(SignalResponseFactoryReset $factory_reset): self
+    public function setFactoryReset(?SignalResponseFactoryReset $factory_reset): self
     {
         $this->container['factory_reset'] = $factory_reset;
 
@@ -502,7 +502,7 @@ public function getJailbroken(): ?SignalResponseJailbroken
      *
      * @return $this
      */
-    public function setJailbroken(SignalResponseJailbroken $jailbroken): self
+    public function setJailbroken(?SignalResponseJailbroken $jailbroken): self
     {
         $this->container['jailbroken'] = $jailbroken;
 
@@ -524,7 +524,7 @@ public function getFrida(): ?SignalResponseFrida
      *
      * @return $this
      */
-    public function setFrida(SignalResponseFrida $frida): self
+    public function setFrida(?SignalResponseFrida $frida): self
     {
         $this->container['frida'] = $frida;
 
@@ -546,7 +546,7 @@ public function getIpBlocklist(): ?SignalResponseIpBlocklist
      *
      * @return $this
      */
-    public function setIpBlocklist(SignalResponseIpBlocklist $ip_blocklist): self
+    public function setIpBlocklist(?SignalResponseIpBlocklist $ip_blocklist): self
     {
         $this->container['ip_blocklist'] = $ip_blocklist;
 
@@ -568,7 +568,7 @@ public function getTor(): ?SignalResponseTor
      *
      * @return $this
      */
-    public function setTor(SignalResponseTor $tor): self
+    public function setTor(?SignalResponseTor $tor): self
     {
         $this->container['tor'] = $tor;
 
@@ -590,7 +590,7 @@ public function getPrivacySettings(): ?SignalResponsePrivacySettings
      *
      * @return $this
      */
-    public function setPrivacySettings(SignalResponsePrivacySettings $privacy_settings): self
+    public function setPrivacySettings(?SignalResponsePrivacySettings $privacy_settings): self
     {
         $this->container['privacy_settings'] = $privacy_settings;
 
@@ -612,7 +612,7 @@ public function getVirtualMachine(): ?SignalResponseVirtualMachine
      *
      * @return $this
      */
-    public function setVirtualMachine(SignalResponseVirtualMachine $virtual_machine): self
+    public function setVirtualMachine(?SignalResponseVirtualMachine $virtual_machine): self
     {
         $this->container['virtual_machine'] = $virtual_machine;
 
@@ -634,7 +634,7 @@ public function getVpn(): ?SignalResponseVpn
      *
      * @return $this
      */
-    public function setVpn(SignalResponseVpn $vpn): self
+    public function setVpn(?SignalResponseVpn $vpn): self
     {
         $this->container['vpn'] = $vpn;
 
@@ -656,7 +656,7 @@ public function getProxy(): ?SignalResponseProxy
      *
      * @return $this
      */
-    public function setProxy(SignalResponseProxy $proxy): self
+    public function setProxy(?SignalResponseProxy $proxy): self
     {
         $this->container['proxy'] = $proxy;
 
@@ -678,7 +678,7 @@ public function getTampering(): ?SignalResponseTampering
      *
      * @return $this
      */
-    public function setTampering(SignalResponseTampering $tampering): self
+    public function setTampering(?SignalResponseTampering $tampering): self
     {
         $this->container['tampering'] = $tampering;
 
@@ -700,7 +700,7 @@ public function getHighActivity(): ?SignalResponseHighActivity
      *
      * @return $this
      */
-    public function setHighActivity(SignalResponseHighActivity $high_activity): self
+    public function setHighActivity(?SignalResponseHighActivity $high_activity): self
     {
         $this->container['high_activity'] = $high_activity;
 
@@ -722,7 +722,7 @@ public function getLocationSpoofing(): ?SignalResponseLocationSpoofing
      *
      * @return $this
      */
-    public function setLocationSpoofing(SignalResponseLocationSpoofing $location_spoofing): self
+    public function setLocationSpoofing(?SignalResponseLocationSpoofing $location_spoofing): self
     {
         $this->container['location_spoofing'] = $location_spoofing;
 
@@ -744,7 +744,7 @@ public function getSuspectScore(): ?SignalResponseSuspectScore
      *
      * @return $this
      */
-    public function setSuspectScore(SignalResponseSuspectScore $suspect_score): self
+    public function setSuspectScore(?SignalResponseSuspectScore $suspect_score): self
     {
         $this->container['suspect_score'] = $suspect_score;
 
@@ -766,7 +766,7 @@ public function getRawDeviceAttributes(): ?SignalResponseRawDeviceAttributes
      *
      * @return $this
      */
-    public function setRawDeviceAttributes(SignalResponseRawDeviceAttributes $raw_device_attributes): self
+    public function setRawDeviceAttributes(?SignalResponseRawDeviceAttributes $raw_device_attributes): self
     {
         $this->container['raw_device_attributes'] = $raw_device_attributes;
 
diff --git a/src/Model/ProductsResponseBotd.php b/src/Model/ProductsResponseBotd.php
index 6d04a535..05b6ab5a 100644
--- a/src/Model/ProductsResponseBotd.php
+++ b/src/Model/ProductsResponseBotd.php
@@ -210,7 +210,7 @@ public function getData(): ?BotdResult
      *
      * @return $this
      */
-    public function setData(BotdResult $data): self
+    public function setData(?BotdResult $data): self
     {
         $this->container['data'] = $data;
 
@@ -232,7 +232,7 @@ public function getError(): ?ProductError
      *
      * @return $this
      */
-    public function setError(ProductError $error): self
+    public function setError(?ProductError $error): self
     {
         $this->container['error'] = $error;
 
diff --git a/src/Model/ProductsResponseIdentification.php b/src/Model/ProductsResponseIdentification.php
index de7010cd..d9d0022a 100644
--- a/src/Model/ProductsResponseIdentification.php
+++ b/src/Model/ProductsResponseIdentification.php
@@ -210,7 +210,7 @@ public function getData(): ?ProductsResponseIdentificationData
      *
      * @return $this
      */
-    public function setData(ProductsResponseIdentificationData $data): self
+    public function setData(?ProductsResponseIdentificationData $data): self
     {
         $this->container['data'] = $data;
 
@@ -232,7 +232,7 @@ public function getError(): ?IdentificationError
      *
      * @return $this
      */
-    public function setError(IdentificationError $error): self
+    public function setError(?IdentificationError $error): self
     {
         $this->container['error'] = $error;
 
diff --git a/src/Model/ProductsResponseIdentificationData.php b/src/Model/ProductsResponseIdentificationData.php
index 07762091..5e6294d2 100644
--- a/src/Model/ProductsResponseIdentificationData.php
+++ b/src/Model/ProductsResponseIdentificationData.php
@@ -415,7 +415,7 @@ public function getIpLocation(): ?DeprecatedIPLocation
      *
      * @return $this
      */
-    public function setIpLocation(DeprecatedIPLocation $ip_location): self
+    public function setIpLocation(?DeprecatedIPLocation $ip_location): self
     {
         $this->container['ip_location'] = $ip_location;
 
@@ -527,7 +527,7 @@ public function getLinkedId(): ?string
      *
      * @return $this
      */
-    public function setLinkedId(string $linked_id): self
+    public function setLinkedId(?string $linked_id): self
     {
         $this->container['linked_id'] = $linked_id;
 
@@ -549,7 +549,7 @@ public function getConfidence(): ?Confidence
      *
      * @return $this
      */
-    public function setConfidence(Confidence $confidence): self
+    public function setConfidence(?Confidence $confidence): self
     {
         $this->container['confidence'] = $confidence;
 
diff --git a/src/Model/Response.php b/src/Model/Response.php
index b054c409..b8e54550 100644
--- a/src/Model/Response.php
+++ b/src/Model/Response.php
@@ -279,7 +279,7 @@ public function getLastTimestamp(): ?int
      *
      * @return $this
      */
-    public function setLastTimestamp(int $last_timestamp): self
+    public function setLastTimestamp(?int $last_timestamp): self
     {
         $this->container['last_timestamp'] = $last_timestamp;
 
@@ -301,7 +301,7 @@ public function getPaginationKey(): ?string
      *
      * @return $this
      */
-    public function setPaginationKey(string $pagination_key): self
+    public function setPaginationKey(?string $pagination_key): self
     {
         $this->container['pagination_key'] = $pagination_key;
 
diff --git a/src/Model/ResponseVisits.php b/src/Model/ResponseVisits.php
index 63c7135e..383134e5 100644
--- a/src/Model/ResponseVisits.php
+++ b/src/Model/ResponseVisits.php
@@ -406,7 +406,7 @@ public function getIpLocation(): ?DeprecatedIPLocation
      *
      * @return $this
      */
-    public function setIpLocation(DeprecatedIPLocation $ip_location): self
+    public function setIpLocation(?DeprecatedIPLocation $ip_location): self
     {
         $this->container['ip_location'] = $ip_location;
 
@@ -518,7 +518,7 @@ public function getLinkedId(): ?string
      *
      * @return $this
      */
-    public function setLinkedId(string $linked_id): self
+    public function setLinkedId(?string $linked_id): self
     {
         $this->container['linked_id'] = $linked_id;
 
@@ -540,7 +540,7 @@ public function getConfidence(): ?Confidence
      *
      * @return $this
      */
-    public function setConfidence(Confidence $confidence): self
+    public function setConfidence(?Confidence $confidence): self
     {
         $this->container['confidence'] = $confidence;
 
diff --git a/src/Model/SignalResponseClonedApp.php b/src/Model/SignalResponseClonedApp.php
index 85eab68e..94b5e5c5 100644
--- a/src/Model/SignalResponseClonedApp.php
+++ b/src/Model/SignalResponseClonedApp.php
@@ -210,7 +210,7 @@ public function getData(): ?ClonedAppResult
      *
      * @return $this
      */
-    public function setData(ClonedAppResult $data): self
+    public function setData(?ClonedAppResult $data): self
     {
         $this->container['data'] = $data;
 
@@ -232,7 +232,7 @@ public function getError(): ?ProductError
      *
      * @return $this
      */
-    public function setError(ProductError $error): self
+    public function setError(?ProductError $error): self
     {
         $this->container['error'] = $error;
 
diff --git a/src/Model/SignalResponseEmulator.php b/src/Model/SignalResponseEmulator.php
index 92bfaa0e..7d276ca0 100644
--- a/src/Model/SignalResponseEmulator.php
+++ b/src/Model/SignalResponseEmulator.php
@@ -210,7 +210,7 @@ public function getData(): ?EmulatorResult
      *
      * @return $this
      */
-    public function setData(EmulatorResult $data): self
+    public function setData(?EmulatorResult $data): self
     {
         $this->container['data'] = $data;
 
@@ -232,7 +232,7 @@ public function getError(): ?ProductError
      *
      * @return $this
      */
-    public function setError(ProductError $error): self
+    public function setError(?ProductError $error): self
     {
         $this->container['error'] = $error;
 
diff --git a/src/Model/SignalResponseFactoryReset.php b/src/Model/SignalResponseFactoryReset.php
index 2f13a181..4604cc6a 100644
--- a/src/Model/SignalResponseFactoryReset.php
+++ b/src/Model/SignalResponseFactoryReset.php
@@ -210,7 +210,7 @@ public function getData(): ?FactoryResetResult
      *
      * @return $this
      */
-    public function setData(FactoryResetResult $data): self
+    public function setData(?FactoryResetResult $data): self
     {
         $this->container['data'] = $data;
 
@@ -232,7 +232,7 @@ public function getError(): ?ProductError
      *
      * @return $this
      */
-    public function setError(ProductError $error): self
+    public function setError(?ProductError $error): self
     {
         $this->container['error'] = $error;
 
diff --git a/src/Model/SignalResponseFrida.php b/src/Model/SignalResponseFrida.php
index 95da9699..1ffb8297 100644
--- a/src/Model/SignalResponseFrida.php
+++ b/src/Model/SignalResponseFrida.php
@@ -210,7 +210,7 @@ public function getData(): ?FridaResult
      *
      * @return $this
      */
-    public function setData(FridaResult $data): self
+    public function setData(?FridaResult $data): self
     {
         $this->container['data'] = $data;
 
@@ -232,7 +232,7 @@ public function getError(): ?ProductError
      *
      * @return $this
      */
-    public function setError(ProductError $error): self
+    public function setError(?ProductError $error): self
     {
         $this->container['error'] = $error;
 
diff --git a/src/Model/SignalResponseHighActivity.php b/src/Model/SignalResponseHighActivity.php
index 23a67629..6bccfd1a 100644
--- a/src/Model/SignalResponseHighActivity.php
+++ b/src/Model/SignalResponseHighActivity.php
@@ -210,7 +210,7 @@ public function getData(): ?HighActivityResult
      *
      * @return $this
      */
-    public function setData(HighActivityResult $data): self
+    public function setData(?HighActivityResult $data): self
     {
         $this->container['data'] = $data;
 
@@ -232,7 +232,7 @@ public function getError(): ?ProductError
      *
      * @return $this
      */
-    public function setError(ProductError $error): self
+    public function setError(?ProductError $error): self
     {
         $this->container['error'] = $error;
 
diff --git a/src/Model/SignalResponseIncognito.php b/src/Model/SignalResponseIncognito.php
index a4cee05c..cf0e38dc 100644
--- a/src/Model/SignalResponseIncognito.php
+++ b/src/Model/SignalResponseIncognito.php
@@ -210,7 +210,7 @@ public function getData(): ?IncognitoResult
      *
      * @return $this
      */
-    public function setData(IncognitoResult $data): self
+    public function setData(?IncognitoResult $data): self
     {
         $this->container['data'] = $data;
 
@@ -232,7 +232,7 @@ public function getError(): ?ProductError
      *
      * @return $this
      */
-    public function setError(ProductError $error): self
+    public function setError(?ProductError $error): self
     {
         $this->container['error'] = $error;
 
diff --git a/src/Model/SignalResponseIpBlocklist.php b/src/Model/SignalResponseIpBlocklist.php
index 292102ea..34e14b10 100644
--- a/src/Model/SignalResponseIpBlocklist.php
+++ b/src/Model/SignalResponseIpBlocklist.php
@@ -210,7 +210,7 @@ public function getData(): ?IpBlockListResult
      *
      * @return $this
      */
-    public function setData(IpBlockListResult $data): self
+    public function setData(?IpBlockListResult $data): self
     {
         $this->container['data'] = $data;
 
@@ -232,7 +232,7 @@ public function getError(): ?ProductError
      *
      * @return $this
      */
-    public function setError(ProductError $error): self
+    public function setError(?ProductError $error): self
     {
         $this->container['error'] = $error;
 
diff --git a/src/Model/SignalResponseIpInfo.php b/src/Model/SignalResponseIpInfo.php
index 952c0eed..29ccda62 100644
--- a/src/Model/SignalResponseIpInfo.php
+++ b/src/Model/SignalResponseIpInfo.php
@@ -210,7 +210,7 @@ public function getData(): ?IpInfoResult
      *
      * @return $this
      */
-    public function setData(IpInfoResult $data): self
+    public function setData(?IpInfoResult $data): self
     {
         $this->container['data'] = $data;
 
@@ -232,7 +232,7 @@ public function getError(): ?ProductError
      *
      * @return $this
      */
-    public function setError(ProductError $error): self
+    public function setError(?ProductError $error): self
     {
         $this->container['error'] = $error;
 
diff --git a/src/Model/SignalResponseJailbroken.php b/src/Model/SignalResponseJailbroken.php
index b05c3baf..80f630af 100644
--- a/src/Model/SignalResponseJailbroken.php
+++ b/src/Model/SignalResponseJailbroken.php
@@ -210,7 +210,7 @@ public function getData(): ?JailbrokenResult
      *
      * @return $this
      */
-    public function setData(JailbrokenResult $data): self
+    public function setData(?JailbrokenResult $data): self
     {
         $this->container['data'] = $data;
 
@@ -232,7 +232,7 @@ public function getError(): ?ProductError
      *
      * @return $this
      */
-    public function setError(ProductError $error): self
+    public function setError(?ProductError $error): self
     {
         $this->container['error'] = $error;
 
diff --git a/src/Model/SignalResponseLocationSpoofing.php b/src/Model/SignalResponseLocationSpoofing.php
index d492ea52..ed6dfee7 100644
--- a/src/Model/SignalResponseLocationSpoofing.php
+++ b/src/Model/SignalResponseLocationSpoofing.php
@@ -210,7 +210,7 @@ public function getData(): ?LocationSpoofingResult
      *
      * @return $this
      */
-    public function setData(LocationSpoofingResult $data): self
+    public function setData(?LocationSpoofingResult $data): self
     {
         $this->container['data'] = $data;
 
@@ -232,7 +232,7 @@ public function getError(): ?ProductError
      *
      * @return $this
      */
-    public function setError(ProductError $error): self
+    public function setError(?ProductError $error): self
     {
         $this->container['error'] = $error;
 
diff --git a/src/Model/SignalResponsePrivacySettings.php b/src/Model/SignalResponsePrivacySettings.php
index 55a85f9b..a5b03b89 100644
--- a/src/Model/SignalResponsePrivacySettings.php
+++ b/src/Model/SignalResponsePrivacySettings.php
@@ -210,7 +210,7 @@ public function getData(): ?PrivacySettingsResult
      *
      * @return $this
      */
-    public function setData(PrivacySettingsResult $data): self
+    public function setData(?PrivacySettingsResult $data): self
     {
         $this->container['data'] = $data;
 
@@ -232,7 +232,7 @@ public function getError(): ?ProductError
      *
      * @return $this
      */
-    public function setError(ProductError $error): self
+    public function setError(?ProductError $error): self
     {
         $this->container['error'] = $error;
 
diff --git a/src/Model/SignalResponseProxy.php b/src/Model/SignalResponseProxy.php
index aac706d6..a58f07e0 100644
--- a/src/Model/SignalResponseProxy.php
+++ b/src/Model/SignalResponseProxy.php
@@ -210,7 +210,7 @@ public function getData(): ?ProxyResult
      *
      * @return $this
      */
-    public function setData(ProxyResult $data): self
+    public function setData(?ProxyResult $data): self
     {
         $this->container['data'] = $data;
 
@@ -232,7 +232,7 @@ public function getError(): ?ProductError
      *
      * @return $this
      */
-    public function setError(ProductError $error): self
+    public function setError(?ProductError $error): self
     {
         $this->container['error'] = $error;
 
diff --git a/src/Model/SignalResponseRawDeviceAttributes.php b/src/Model/SignalResponseRawDeviceAttributes.php
index 24fe783e..820bdac3 100644
--- a/src/Model/SignalResponseRawDeviceAttributes.php
+++ b/src/Model/SignalResponseRawDeviceAttributes.php
@@ -210,7 +210,7 @@ public function getData(): array
      *
      * @return $this
      */
-    public function setData(array $data): self
+    public function setData(?array $data): self
     {
         $this->container['data'] = $data;
 
@@ -232,7 +232,7 @@ public function getError(): ?ProductError
      *
      * @return $this
      */
-    public function setError(ProductError $error): self
+    public function setError(?ProductError $error): self
     {
         $this->container['error'] = $error;
 
diff --git a/src/Model/SignalResponseRootApps.php b/src/Model/SignalResponseRootApps.php
index 11dbd25c..0a01e9f3 100644
--- a/src/Model/SignalResponseRootApps.php
+++ b/src/Model/SignalResponseRootApps.php
@@ -210,7 +210,7 @@ public function getData(): ?RootAppsResult
      *
      * @return $this
      */
-    public function setData(RootAppsResult $data): self
+    public function setData(?RootAppsResult $data): self
     {
         $this->container['data'] = $data;
 
@@ -232,7 +232,7 @@ public function getError(): ?ProductError
      *
      * @return $this
      */
-    public function setError(ProductError $error): self
+    public function setError(?ProductError $error): self
     {
         $this->container['error'] = $error;
 
diff --git a/src/Model/SignalResponseSuspectScore.php b/src/Model/SignalResponseSuspectScore.php
index a91a75b0..e20baa97 100644
--- a/src/Model/SignalResponseSuspectScore.php
+++ b/src/Model/SignalResponseSuspectScore.php
@@ -210,7 +210,7 @@ public function getData(): ?SuspectScoreResult
      *
      * @return $this
      */
-    public function setData(SuspectScoreResult $data): self
+    public function setData(?SuspectScoreResult $data): self
     {
         $this->container['data'] = $data;
 
@@ -232,7 +232,7 @@ public function getError(): ?ProductError
      *
      * @return $this
      */
-    public function setError(ProductError $error): self
+    public function setError(?ProductError $error): self
     {
         $this->container['error'] = $error;
 
diff --git a/src/Model/SignalResponseTampering.php b/src/Model/SignalResponseTampering.php
index 5a3a99e7..2753a81e 100644
--- a/src/Model/SignalResponseTampering.php
+++ b/src/Model/SignalResponseTampering.php
@@ -210,7 +210,7 @@ public function getData(): ?TamperingResult
      *
      * @return $this
      */
-    public function setData(TamperingResult $data): self
+    public function setData(?TamperingResult $data): self
     {
         $this->container['data'] = $data;
 
@@ -232,7 +232,7 @@ public function getError(): ?ProductError
      *
      * @return $this
      */
-    public function setError(ProductError $error): self
+    public function setError(?ProductError $error): self
     {
         $this->container['error'] = $error;
 
diff --git a/src/Model/SignalResponseTor.php b/src/Model/SignalResponseTor.php
index b6c87ed6..619c632b 100644
--- a/src/Model/SignalResponseTor.php
+++ b/src/Model/SignalResponseTor.php
@@ -210,7 +210,7 @@ public function getData(): ?TorResult
      *
      * @return $this
      */
-    public function setData(TorResult $data): self
+    public function setData(?TorResult $data): self
     {
         $this->container['data'] = $data;
 
@@ -232,7 +232,7 @@ public function getError(): ?ProductError
      *
      * @return $this
      */
-    public function setError(ProductError $error): self
+    public function setError(?ProductError $error): self
     {
         $this->container['error'] = $error;
 
diff --git a/src/Model/SignalResponseVirtualMachine.php b/src/Model/SignalResponseVirtualMachine.php
index 040c3b06..f22f1aba 100644
--- a/src/Model/SignalResponseVirtualMachine.php
+++ b/src/Model/SignalResponseVirtualMachine.php
@@ -210,7 +210,7 @@ public function getData(): ?VirtualMachineResult
      *
      * @return $this
      */
-    public function setData(VirtualMachineResult $data): self
+    public function setData(?VirtualMachineResult $data): self
     {
         $this->container['data'] = $data;
 
@@ -232,7 +232,7 @@ public function getError(): ?ProductError
      *
      * @return $this
      */
-    public function setError(ProductError $error): self
+    public function setError(?ProductError $error): self
     {
         $this->container['error'] = $error;
 
diff --git a/src/Model/SignalResponseVpn.php b/src/Model/SignalResponseVpn.php
index d53ddab5..2f1a193f 100644
--- a/src/Model/SignalResponseVpn.php
+++ b/src/Model/SignalResponseVpn.php
@@ -210,7 +210,7 @@ public function getData(): ?VpnResult
      *
      * @return $this
      */
-    public function setData(VpnResult $data): self
+    public function setData(?VpnResult $data): self
     {
         $this->container['data'] = $data;
 
@@ -232,7 +232,7 @@ public function getError(): ?ProductError
      *
      * @return $this
      */
-    public function setError(ProductError $error): self
+    public function setError(?ProductError $error): self
     {
         $this->container['error'] = $error;
 
diff --git a/src/Model/Subdivision.php b/src/Model/Subdivision.php
index 4ffa743c..fb950e9c 100644
--- a/src/Model/Subdivision.php
+++ b/src/Model/Subdivision.php
@@ -210,7 +210,7 @@ public function getIsoCode(): ?string
      *
      * @return $this
      */
-    public function setIsoCode(string $iso_code): self
+    public function setIsoCode(?string $iso_code): self
     {
         $this->container['iso_code'] = $iso_code;
 
@@ -232,7 +232,7 @@ public function getName(): ?string
      *
      * @return $this
      */
-    public function setName(string $name): self
+    public function setName(?string $name): self
     {
         $this->container['name'] = $name;
 
diff --git a/src/Model/Visit.php b/src/Model/Visit.php
index 72c306a6..f6724fdc 100644
--- a/src/Model/Visit.php
+++ b/src/Model/Visit.php
@@ -406,7 +406,7 @@ public function getIpLocation(): ?DeprecatedIPLocation
      *
      * @return $this
      */
-    public function setIpLocation(DeprecatedIPLocation $ip_location): self
+    public function setIpLocation(?DeprecatedIPLocation $ip_location): self
     {
         $this->container['ip_location'] = $ip_location;
 
@@ -518,7 +518,7 @@ public function getLinkedId(): ?string
      *
      * @return $this
      */
-    public function setLinkedId(string $linked_id): self
+    public function setLinkedId(?string $linked_id): self
     {
         $this->container['linked_id'] = $linked_id;
 
@@ -540,7 +540,7 @@ public function getConfidence(): ?Confidence
      *
      * @return $this
      */
-    public function setConfidence(Confidence $confidence): self
+    public function setConfidence(?Confidence $confidence): self
     {
         $this->container['confidence'] = $confidence;
 
diff --git a/src/Model/VpnResult.php b/src/Model/VpnResult.php
index e320c874..117dba4b 100644
--- a/src/Model/VpnResult.php
+++ b/src/Model/VpnResult.php
@@ -278,7 +278,7 @@ public function getOriginCountry(): ?string
      *
      * @return $this
      */
-    public function setOriginCountry(string $origin_country): self
+    public function setOriginCountry(?string $origin_country): self
     {
         $this->container['origin_country'] = $origin_country;
 
diff --git a/src/Model/WebhookVisit.php b/src/Model/WebhookVisit.php
index fe15564a..6009a49b 100644
--- a/src/Model/WebhookVisit.php
+++ b/src/Model/WebhookVisit.php
@@ -475,7 +475,7 @@ public function getClientReferrer(): ?string
      *
      * @return $this
      */
-    public function setClientReferrer(string $client_referrer): self
+    public function setClientReferrer(?string $client_referrer): self
     {
         $this->container['client_referrer'] = $client_referrer;
 
@@ -497,7 +497,7 @@ public function getUserAgent(): ?string
      *
      * @return $this
      */
-    public function setUserAgent(string $user_agent): self
+    public function setUserAgent(?string $user_agent): self
     {
         $this->container['user_agent'] = $user_agent;
 
@@ -519,7 +519,7 @@ public function getBot(): ?BotdDetectionResult
      *
      * @return $this
      */
-    public function setBot(BotdDetectionResult $bot): self
+    public function setBot(?BotdDetectionResult $bot): self
     {
         $this->container['bot'] = $bot;
 
@@ -541,7 +541,7 @@ public function getIpInfo(): ?IpInfoResult
      *
      * @return $this
      */
-    public function setIpInfo(IpInfoResult $ip_info): self
+    public function setIpInfo(?IpInfoResult $ip_info): self
     {
         $this->container['ip_info'] = $ip_info;
 
@@ -585,7 +585,7 @@ public function getRootApps(): ?RootAppsResult
      *
      * @return $this
      */
-    public function setRootApps(RootAppsResult $root_apps): self
+    public function setRootApps(?RootAppsResult $root_apps): self
     {
         $this->container['root_apps'] = $root_apps;
 
@@ -607,7 +607,7 @@ public function getEmulator(): ?EmulatorResult
      *
      * @return $this
      */
-    public function setEmulator(EmulatorResult $emulator): self
+    public function setEmulator(?EmulatorResult $emulator): self
     {
         $this->container['emulator'] = $emulator;
 
@@ -629,7 +629,7 @@ public function getClonedApp(): ?ClonedAppResult
      *
      * @return $this
      */
-    public function setClonedApp(ClonedAppResult $cloned_app): self
+    public function setClonedApp(?ClonedAppResult $cloned_app): self
     {
         $this->container['cloned_app'] = $cloned_app;
 
@@ -651,7 +651,7 @@ public function getFactoryReset(): ?FactoryResetResult
      *
      * @return $this
      */
-    public function setFactoryReset(FactoryResetResult $factory_reset): self
+    public function setFactoryReset(?FactoryResetResult $factory_reset): self
     {
         $this->container['factory_reset'] = $factory_reset;
 
@@ -673,7 +673,7 @@ public function getJailbroken(): ?JailbrokenResult
      *
      * @return $this
      */
-    public function setJailbroken(JailbrokenResult $jailbroken): self
+    public function setJailbroken(?JailbrokenResult $jailbroken): self
     {
         $this->container['jailbroken'] = $jailbroken;
 
@@ -695,7 +695,7 @@ public function getFrida(): ?FridaResult
      *
      * @return $this
      */
-    public function setFrida(FridaResult $frida): self
+    public function setFrida(?FridaResult $frida): self
     {
         $this->container['frida'] = $frida;
 
@@ -717,7 +717,7 @@ public function getIpBlocklist(): ?IpBlockListResult
      *
      * @return $this
      */
-    public function setIpBlocklist(IpBlockListResult $ip_blocklist): self
+    public function setIpBlocklist(?IpBlockListResult $ip_blocklist): self
     {
         $this->container['ip_blocklist'] = $ip_blocklist;
 
@@ -739,7 +739,7 @@ public function getTor(): ?TorResult
      *
      * @return $this
      */
-    public function setTor(TorResult $tor): self
+    public function setTor(?TorResult $tor): self
     {
         $this->container['tor'] = $tor;
 
@@ -761,7 +761,7 @@ public function getPrivacySettings(): ?PrivacySettingsResult
      *
      * @return $this
      */
-    public function setPrivacySettings(PrivacySettingsResult $privacy_settings): self
+    public function setPrivacySettings(?PrivacySettingsResult $privacy_settings): self
     {
         $this->container['privacy_settings'] = $privacy_settings;
 
@@ -783,7 +783,7 @@ public function getVirtualMachine(): ?VirtualMachineResult
      *
      * @return $this
      */
-    public function setVirtualMachine(VirtualMachineResult $virtual_machine): self
+    public function setVirtualMachine(?VirtualMachineResult $virtual_machine): self
     {
         $this->container['virtual_machine'] = $virtual_machine;
 
@@ -805,7 +805,7 @@ public function getVpn(): ?VpnResult
      *
      * @return $this
      */
-    public function setVpn(VpnResult $vpn): self
+    public function setVpn(?VpnResult $vpn): self
     {
         $this->container['vpn'] = $vpn;
 
@@ -827,7 +827,7 @@ public function getProxy(): ?ProxyResult
      *
      * @return $this
      */
-    public function setProxy(ProxyResult $proxy): self
+    public function setProxy(?ProxyResult $proxy): self
     {
         $this->container['proxy'] = $proxy;
 
@@ -849,7 +849,7 @@ public function getTampering(): ?TamperingResult
      *
      * @return $this
      */
-    public function setTampering(TamperingResult $tampering): self
+    public function setTampering(?TamperingResult $tampering): self
     {
         $this->container['tampering'] = $tampering;
 
@@ -871,7 +871,7 @@ public function getRawDeviceAttributes(): ?RawDeviceAttributesResult
      *
      * @return $this
      */
-    public function setRawDeviceAttributes(RawDeviceAttributesResult $raw_device_attributes): self
+    public function setRawDeviceAttributes(?RawDeviceAttributesResult $raw_device_attributes): self
     {
         $this->container['raw_device_attributes'] = $raw_device_attributes;
 
@@ -893,7 +893,7 @@ public function getHighActivity(): ?HighActivityResult
      *
      * @return $this
      */
-    public function setHighActivity(HighActivityResult $high_activity): self
+    public function setHighActivity(?HighActivityResult $high_activity): self
     {
         $this->container['high_activity'] = $high_activity;
 
@@ -915,7 +915,7 @@ public function getLocationSpoofing(): ?LocationSpoofingResult
      *
      * @return $this
      */
-    public function setLocationSpoofing(LocationSpoofingResult $location_spoofing): self
+    public function setLocationSpoofing(?LocationSpoofingResult $location_spoofing): self
     {
         $this->container['location_spoofing'] = $location_spoofing;
 
@@ -937,7 +937,7 @@ public function getSuspectScore(): ?SuspectScoreResult
      *
      * @return $this
      */
-    public function setSuspectScore(SuspectScoreResult $suspect_score): self
+    public function setSuspectScore(?SuspectScoreResult $suspect_score): self
     {
         $this->container['suspect_score'] = $suspect_score;
 
@@ -1025,7 +1025,7 @@ public function getIpLocation(): ?DeprecatedIPLocation
      *
      * @return $this
      */
-    public function setIpLocation(DeprecatedIPLocation $ip_location): self
+    public function setIpLocation(?DeprecatedIPLocation $ip_location): self
     {
         $this->container['ip_location'] = $ip_location;
 
@@ -1137,7 +1137,7 @@ public function getLinkedId(): ?string
      *
      * @return $this
      */
-    public function setLinkedId(string $linked_id): self
+    public function setLinkedId(?string $linked_id): self
     {
         $this->container['linked_id'] = $linked_id;
 
@@ -1159,7 +1159,7 @@ public function getConfidence(): ?Confidence
      *
      * @return $this
      */
-    public function setConfidence(Confidence $confidence): self
+    public function setConfidence(?Confidence $confidence): self
     {
         $this->container['confidence'] = $confidence;
 
diff --git a/template/model_generic.mustache b/template/model_generic.mustache
index c4dc68cc..321cf0bb 100644
--- a/template/model_generic.mustache
+++ b/template/model_generic.mustache
@@ -260,7 +260,7 @@ class {{classname}} {{#parentSchema}}extends {{{parent}}} {{/parentSchema}}{{^pa
      *
      * @return $this
      */
-    public function {{setter}}({{^isListContainer}}{{^isMapContainer}}{{^isDouble}}{{datatype}}{{/isDouble}}{{/isMapContainer}}{{/isListContainer}}{{#isListContainer}}array{{/isListContainer}}{{#isMapContainer}}array{{/isMapContainer}}{{#isDouble}}float{{/isDouble}} ${{name}}): self
+    public function {{setter}}({{^required}}?{{/required}}{{^isListContainer}}{{^isMapContainer}}{{^isDouble}}{{datatype}}{{/isDouble}}{{/isMapContainer}}{{/isListContainer}}{{#isListContainer}}array{{/isListContainer}}{{#isMapContainer}}array{{/isMapContainer}}{{#isDouble}}float{{/isDouble}} ${{name}}): self
     {
         {{#isEnum}}
         $allowedValues = $this->{{getter}}AllowableValues();