code: def cred_def_id(issuer_did: str, schema_seq_no: int, protocol: Protocol = None) -> str:
      
  
      return (protocol or Protocol.DEFAULT).cred_def_id(issuer_did, schema_seq_no)
docs: Return credential definition identifier for input issuer DID and schema sequence number.
  
      Implementation passes to NodePool Protocol.
  
      :param issuer_did: DID of credential definition issuer
      :param schema_seq_no: schema sequence number
      :param protocol: indy protocol version
      :return: credential definition identifier