code: def serialize(self):
      # type: () -> str
      raise NotImplementedError
  
imports: from __future__ import absolute_import, division, print_function
  import operator
  import os
  import platform
  import sys
  from pyparsing import Forward, Group, Literal, ParseException, ParseResults, QuotedString, ZeroOrMore, stringEnd, stringStart
  from ._compat import string_types
  from ._typing import TYPE_CHECKING
  from .specifiers import InvalidSpecifier, Specifier
label_desc: Use image node_id 4 for calling the Node obj's underlying member method code with example usage: obj.serialize() without return types