mongoc_apm_command_started_get_operation_id man page
mongoc_apm_command_started_get_operation_id — mongoc_apm_command_started_get_operation_id()
int64_t mongoc_apm_command_started_get_operation_id ( const mongoc_apm_command_started_t *event);
Returns this event's operation id. This number correlates all the commands in a bulk operation, or all the "find" and "getMore" commands required to stream a large query result.
event: A mongoc_apm_command_started_t.
The event's operation id.
Introduction to Application Performance Monitoring
2017, MongoDB, Inc