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SystemWindow is a frequently used class in Morphic. It is a subclass of MorphicModel.
A SystemWindow implements a window that can contain other morphs, typically Pluggable<whatever>Morphs.
However every Morph object understands the message openInWindowLabeled: .
((Morph new extent: 480@320; color: Color white)
addMorph: 'my string' asMorph
)
openInWindowLabeled: '480x320 (HVGA) resolution'