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public static interface BeforeCollapseItemEvent.HasBeforeCollapseItemHandlers<T>
A widget that implements this interface is a public source of
BeforeCollapseItemEvent
events.
Method Summary | |
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HandlerRegistration |
addBeforeCollapseHandler(BeforeCollapseItemEvent.BeforeCollapseItemHandler<T> handler)
Adds a BeforeCollapseItemEvent.BeforeCollapseItemHandler handler for BeforeCollapseItemEvent
events. |
Method Detail |
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HandlerRegistration addBeforeCollapseHandler(BeforeCollapseItemEvent.BeforeCollapseItemHandler<T> handler)
BeforeCollapseItemEvent.BeforeCollapseItemHandler
handler for BeforeCollapseItemEvent
events.
handler
- the handler
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