class_docstr: A non-data descriptor that makes a value only visible on the class.
  
  This is like the "classmethod" builtin, but does not show up on
  instances of the class.  It may be used as a decorator.
code: def __get__(self, obj, cls):
      if obj is not None:
          raise AttributeError(self.name)
      # called on the class
      return self.getter(None, cls)
  
file_path: cpython/Tools/c-analyzer/c_common/clsutil.py
label_desc: Use image node_id 3 for calling the classonly obj's underlying member method code with example usage: obj.__get__(obj, cls) and returns: self