Synchronously flushes @connection. The calling thread is blocked until this is done. See g_dbus_connection_flush() for the asynchronous version of this method and more details about what it does.
a #GCancellable or %NULL
%TRUE if the operation succeeded, %FALSE if @error is set
GException on failure.
2.26
See Implementation
Synchronously flushes @connection. The calling thread is blocked until this is done. See g_dbus_connection_flush() for the asynchronous version of this method and more details about what it does.