Returns a deepcopy of the state

        :rtype: satosa.state.State

        :return: A copy of the state

def copy(self):
        """
        Returns a deepcopy of the state

        :rtype: satosa.state.State

        :return: A copy of the state
        """
        state_copy = State()
        state_copy._state_dict = copy.deepcopy(self._state_dict)
        return state_copy