code: def generic_visit(self, node, *args, **kwargs):
      node = super(Optimizer, self).generic_visit(node, *args, **kwargs)
  
      # Do constant folding. Some other nodes besides Expr have
      # as_const, but folding them causes errors later on.
      if isinstance(node, nodes.Expr):
          try:
              return nodes.Const.from_untrusted(
                  node.as_const(args[0] if args else None),
                  lineno=node.lineno,
                  environment=self.environment,
              )
          except nodes.Impossible:
              pass
  
      return node
  
imports: from .None import nodes
  from .visitor import NodeTransformer
label_desc: Use image node_id 2 for calling the Optimizer obj's underlying member method code with example usage: obj.generic_visit(node) and returns: node, nodes