the return value of add document

[Jerry-qmf]

Please use the following questions as a guideline to help me answer
your issue/question without further inquiry. Thank you.

Which version of Elastic are you using?

[ ] elastic.v7 (for Elasticsearch v7.0.32)

resp, err := client.Index().
Index(esName).
BodyJson(&esData).
Do(context.Background())

this behavior is success, but the return value is
resp=nil;
err={"_index":"***","_type":"_doc","_id":"Oa_VC40B0i7qMU2vSM3a","_version":1,"result":"created","_shards":{"total":2,"successful":2,"failed":0},"_seq_no":8,"_primary_term":1}

I think this correct return value is：
resp = {"_index":"***","_type":"_doc","_id":"Oa_VC40B0i7qMU2vSM3a","_version":1,"result":"created","_shards":{"total":2,"successful":2,"failed":0},"_seq_no":8,"_primary_term":1}
err = nil