NMClient @nmclient: the object which received the signal. @arg1: @nmclient: the object which received the signal. @arg1: @void: @Returns: @client: @Returns: @client: @object_path: @Returns: @user_data: @object_path: @error: @client: @service_name: @connection_path: @device: @specific_object: @callback: @user_data: @client: @active: @client: @Returns: @client: @enabled: @client: @Returns: @client: @Returns: @client: @enabled: @client: @Returns: @client: @Returns: @client: @Returns: @client: @Returns: @client: @sleep: