/**
* g_dbus_connection_call_sync:
* @connection: A #GDBusConnection.
- * @bus_name: A unique or well-known bus name.
+ * @bus_name: (allow-none): A unique or well-known bus name or %NULL if @connection is not a message bus connection.
* @object_path: Path of remote object.
* @interface_name: D-Bus interface to invoke method on.
* @method_name: The name of the method to invoke.
/**
* g_dbus_connection_call_with_unix_fd_list_sync:
* @connection: A #GDBusConnection.
- * @bus_name: A unique or well-known bus name.
+ * @bus_name: (allow-none): A unique or well-known bus name or %NULL if @connection is not a message bus connection.
* @object_path: Path of remote object.
* @interface_name: D-Bus interface to invoke method on.
* @method_name: The name of the method to invoke.