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Last updated at 4:21 pm UTC on 7 May 2019
WThere is a method #isWorldMorph implemented for Morph objects as


	^ false

and for PasteUpMorph objects as


	^ worldState notNil

This means if a PasteUpMorph object has a WorldState object attached. This means that the PasteUpMorph object is the topmost morph and playing the role of desktop in most cases.