code: def get_extra_functions(self) -> Dict[str, Callable]:
          
          methods = {}
          for mName in dir(self):
              m = getattr(self, mName)
              if callable(m) and getattr(m, "extra_fn", False):
                  methods[mName] = m
          return methods
docs: Get a list of additional features
  
          Returns:
              Dict[str, Callable]: A dict of methods marked as additional features.
              Method can be called with ``get_extra_functions()["methodName"]()``.