code: def invocation(s):
      def dec(f):
          f.invocation = s
          return f
  
      return dec
  
file_path: catboost/contrib/tools/python/src/Lib/lib2to3/fixes/fix_operator.py
imports: from lib2to3 import fixer_base
  from lib2to3.fixer_util import Call, Name, String, touch_import
label_desc: Use image node_id 1 for calling a global function with example usage: invocation(s) and returns: dec, f