docs: def get_state_generator(self, action_name, policy, kwargs):
          """
          Returns the state generator to be used for the given action.
  
          :param action_name: Action identifier name.
          :type action_name: unicode | str
          :param policy: An instance of the current policy class.
          :type policy: dockermap.map.policy.base.BasePolicy
          :param kwargs: Keyword arguments. Can be modified by the initialization of the state generator.
          :type kwargs: dict
          :return: State generator object.
          :rtype: dockermap.map.state.base.AbstractStateGenerator
          """
          state_generator_cls = self.generators[action_name][0]
          state_generator = state_generator_cls(policy, kwargs)
          return state_generator