class_docstr: Helper that visits all nodes in the AST tree and assigns .first_token and .last_token attributes
  to each of them. This is the heart of the token-marking logic.
class_docstr_tok: ["Helper","that","visits","all","nodes","in","the","AST","tree","and","assigns",".first_token","and",".last_token","attributes","to","each","of","them",".","This","is","the","heart","of","the","token-marking","logic","."]
code: def visit_default(self, node, first_token, last_token):
      # type: (AstNode, util.Token, util.Token) -> Tuple[util.Token, util.Token]
      # pylint: disable=no-self-use
      # By default, we don't need to adjust the token we computed earlier.
      return (first_token, last_token)
  
imports: import ast
  import numbers
  import sys
  import token
  from ast import Module
  from typing import Callable, List, Union, cast, Optional, Tuple, TYPE_CHECKING
  import six
  from .None import util
  from .asttokens import ASTTokens
  from .util import AstConstant
  from .astroid_compat import astroid_node_classes, BaseContainer
label_desc: Use image node_id 7 for calling the MarkTokens obj's underlying member method code with example usage: obj.visit_default(node, first_token, last_token) and returns: first_token,  last_token