code: def has(self, name: str) -> bool:
      return name in self._extensions
  
file_path: spaCy/spacy/tokens/underscore.py
imports: import copy
  import functools
  from typing import TYPE_CHECKING, Any, Dict, List, Optional, Tuple, Union
  from ..errors import Errors
label_desc: Use image node_id 7 for calling the Underscore obj's underlying member method code with example usage: obj.has(name) and returns: unknown