docs: def __add_action(self, relative_directory, action):
          """
          Add action into the dictionary of actions.
  
          Args:
              relative_directory:
              action:
  
          """
          generator_action_container = self.__actions.retrieve_element_or_default(relative_directory, None)
  
          if generator_action_container is None:
              generator_action_container = GeneratorActionContainer()
              generator_action_container.add_generator_action(action)
              self.__actions.add_element(location=relative_directory, element=generator_action_container)
          else:
              generator_action_container.add_generator_action(action)