pub unsafe extern "C" fn g_dbus_connection_send_message_with_reply(
connection: *mut GDBusConnection,
message: *mut GDBusMessage,
flags: GDBusSendMessageFlags,
timeout_msec: c_int,
out_serial: *mut u32,
cancellable: *mut GCancellable,
callback: GAsyncReadyCallback,
user_data: gpointer
)