def _get_event_request_header(self):
otr_status = (hangouts_pb2.OFF_THE_RECORD_STATUS_OFF_THE_RECORD<EOL>if self.is_off_the_record else<EOL>hangouts_pb2.OFF_THE_RECORD_STATUS_ON_THE_RECORD)<EOL>return hangouts_pb2.EventRequestHeader(<EOL>conversation_id=hangouts_pb2.ConversationId(id=self.id_),<EOL>client_generated_id=self._client.get_client_generated_id(),<EOL>expected_otr=otr_status,<EOL>delivery_medium=self._get_default_delivery_medium(),<EOL>)<EOL>
Return EventRequestHeader for conversation.