code: def __post_init__(self):
      assert (
          self.indent_level >= 0
      ), "indent level cannot be lower than 0"
  
imports: import os
  import re
  import typing
  from dataclasses import dataclass, field
  from shutil import copy, rmtree
  import swagger_parser
  from typing_extensions import Literal, assert_never
label_desc: Use image node_id 1 for calling the IndentedLines obj's underlying member method code with example usage: obj.__post_init__() without return types