scratch that, just add a method that we need

Signed-off-by: William Casarin <[email protected]>

src/filter.rs

@@ -170,15 +170,15 @@ impl FilterBuilder {
         self.start_tags_field('p');
     }
 
-    pub fn start_tag_field(&mut self, tag: char) {
+    fn start_tag_field(&mut self, tag: char) {
         unsafe { bindings::ndb_filter_start_tag_field(self.as_mut_ptr(), tag as u8 as c_char) };
     }
 
-    pub fn end_field(&mut self) {
+    fn end_field(&mut self) {
         unsafe { bindings::ndb_filter_end_field(self.as_mut_ptr()) }
     }
 
-    pub fn events(&mut self, events: Vec<[u8; 32]>) -> &mut Self {
+    pub fn events(&mut self, events: Vec<&[u8; 32]>) -> &mut Self {
         self.start_tag_field('e');
         for ref id in events {
             self.add_id_element(id);
@@ -187,6 +187,13 @@ impl FilterBuilder {
         self
     }
 
+    pub fn event(&mut self, id: &[u8; 32]) -> &mut Self {
+        self.start_tag_field('e');
+        self.add_id_element(id);
+        self.end_field();
+        self
+    }
+
     pub fn ids(&mut self, ids: Vec<[u8; 32]>) -> &mut Self {
         self.start_ids_field();
         for ref id in ids {