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original commit: 87809f6ed0d087991b8135594f27f843e8a10592
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@ -4189,7 +4189,7 @@
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(and (positive? selection) selection)))))
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(define list-box%
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(class100 basic-list-control% (label choices parent callback [style '(single)] [selection 0])
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(class100 basic-list-control% (label choices parent callback [style '(single)] [selection #f])
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(sequence
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(let ([cwho '(constructor list-box)])
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(check-list-control-args cwho label choices parent callback)
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