How to trigger a PostSet event only after setting all properties of a set(object​,'Prop1',V​al1,'Prop2​',Val2) call?

I have a class that calls a single PostSet method whenever one of its properties is changed (to re-evaluate a stored private property). Sometimes, I want to change multiple properties at once with the following syntax:

set(object,'Prop1',Val1,'Prop2',Val2)

However, in that case it does not make sense for me to call the PostSet method twice (once after Prop1 was set; a second time after Prop2 was set). Is there a way to avoid this and call the PostSet method once after setting all properties of a set() call?