code: def __is_bound_method(method):
      
      if not(hasattr(method, "__func__") and hasattr(method, "__self__")):
          return False
  
      # Bound methods have a __self__ attribute pointing to the owner instance
      return six.get_method_self(method) is not None
docs: Return ``True`` if the `method` is a bound method (attached to an class
      instance.
  
      Args:
          method: A method or function type object.