(self)
return self._action != 'add'
``True`` if the instance is persistent in the backend server.
``True`` if the instance is persistent in the backend server.
True if the instance is persistent in the backend server .
def persistent(self):
        '''``True`` if the instance is persistent in the backend server.'''
        return self._action != 'add'
def persistent ( self ) : return self . _action != 'add'