code: def expect(self, type: int, value: Optional[Any] = None) -> str:
      if self.type != type or (
          value is not None and self.value != value
      ):
          self.raise_error(
              "expected %s/%s, got %s/%s",
              type,
              value,
              self.type,
              self.value,
          )
      value = self.value
      self.gettoken()
      return value
  
imports: import os
  from typing import IO, Any, Dict, Iterator, List, NoReturn, Optional, Sequence, Tuple, Union
  from blib2to3.pgen2 import grammar, token, tokenize
  from blib2to3.pgen2.tokenize import GoodTokenInfo
  import pkgutil
  import io
label_desc: Use image node_id 16 for calling the ParserGenerator obj's underlying member method code with example usage: obj.expect(type, value) and returns: value