const mongoc_host_list_t * mongoc_apm_server_opening_get_host (const mongoc_apm_server_opening_t *event);
Returns this event's host. This mongoc_host_list_t is not part of a linked list, it is solely the server for this event. The data is only valid in the scope of the callback that receives this event; copy it if it will be accessed after the callback returns.
A mongoc_host_list_t that should not be modified or freed.