Update class definition without clearing class instances

As of R2018a, when a new class method is added to a classdef file, the class definition updates automatically, e.g.,

>> methods myclass

will list the new class method as soon as the modified classdef file is saved, without the need for any other kind of intervention. This is a great improvement over the days when a nuclear bomb like clear classes was necessary to do this kind of refresh (see this thread).

However, if the method is added in a separate file, within a @myclass folder, I find that it is still necessary to clear all objects of the class from the workspace. This is inconvenient of course, and I was wondering if there was any easier refresh procedure that I was unaware of. Issuing rehash() does not work. I reason that it must be possible to do this without a nuclear bomb, because it is already automatic when the class methods are implemented within a classdef file.