What is the preferred way to reference another class or method from a function's documentation?

Suppose I have:

@dataclass(match_args = True)
class Foo:
  # a ton of attributes
  ...
  def update(self, **kwargs):
      """Update the Foo.

      Keyword Args:
       (a ton of text)
      """
      for arg in self.__match_args__:
        if arg in kwargs:
          self.__dict__[arg] = kwargs[arg]


class Bar:
  cfg = Foo()
  
  def set_cfg(self, **kwargs):
    """Set the cfg. 
    
    Keyword Args:
      see Foo.update
    """
    self.cfg.update(**kwargs)

What is the defensible (or proper) way to back-reference Foo's kwargs documentation, so that I can have 100% documentation but avoid copy pasting?

Preferably, it is in a way the IDE will maintain when I refactor. But if it isn't, that is cool too.