class_docstr: Return a callable object that calls the given method on its operand.
  
  Unlike the builtin `operator.methodcaller`, instances of this class are
  serializable
code: def __call__(self, obj, *args, **kwargs):
      return getattr(obj, self.method)(*args, **kwargs)
  
label_desc: Use image node_id 2 for calling the methodcaller obj's underlying member method code with example usage: obj.__call__(obj) and returns: getattr