/**
 * mongoc_stream_initiator_t:
 * @uri: The uri and options for the stream.
 * @host: The host and port (or UNIX domain socket path) to connect to.
 * @user_data: The pointer passed to mongoc_client_set_stream_initiator.
 * @error: A location for an error.
 *
 * Creates a new mongoc_stream_t for the host and port. Begin a
 * non-blocking connect and return immediately.
 *
 * This can be used by language bindings to create network transports other
 * than those built into libmongoc. An example of such would be the streams
 * API provided by PHP.
 *
 * Returns: A newly allocated mongoc_stream_t or NULL on failure.
 */
typedef mongoc_stream_t *(*mongoc_stream_initiator_t) (
   const mongoc_uri_t *uri,
   const mongoc_host_list_t *host,
   void *user_data,
   bson_error_t *error);