code: def visit_children_decor(func):
      "See Interpreter"
      @wraps(func)
      def inner(cls, tree):
          values = cls.visit_children(tree)
          return func(cls, values)
      return innef visit_children_decor(func):
      "See Interpreter"
      @wraps(func)
      def inner(cls, tree):
          values = cls.visit_children(tree)
          return func(cls, values)
      return inner
docs: See Interpreter