(self, states)
FF controller doesn't have an internal state
        :param states: 
        :return:
FF controller doesn't have an internal state
        :param states: 
        :return:
FF controller doesn t have an internal state : param states : : return :
def notify(self, states):
        """
        FF controller doesn't have an internal state
        :param states: 
        :return: 
        """
        pass
def notify ( self , states ) : pass