code: def is_subtree(root, node):
      if root == node:
          return True
      return any(is_subtree(c, node) for c in root.children)
  
file_path: catboost/contrib/tools/python/src/Lib/lib2to3/fixes/fix_next.py
imports: from ..pgen2 import token
  from ..pygram import python_symbols
  from ..None import fixer_base
  from ..fixer_util import Name, Call, find_binding
label_desc: Use image node_id 3 for calling a global function with example usage: is_subtree(root, node) and returns: any, True