code: def C(classname):
      """get an ObjC Class by name"""
      ret = objc.objc_getClass(_utf8(classname))
      assert ret is not None, "Couldn't find Class %s" % classname
      return ret
  
file_path: catboost/contrib/python/appnope/py2/appnope/_nope.py
imports: from contextlib import contextmanager
  import ctypes
  import ctypes.util
label_desc: Use image node_id 3 for calling a global function with example usage: C(classname) and returns: ret