I - the specific lazy tree item implementationpublic interface I_CmsLazyOpenHandler<I extends CmsLazyTreeItem>
extends com.google.gwt.event.logical.shared.OpenHandler<I>
CmsLazyTreeItemvoid onOpen(com.google.gwt.event.logical.shared.OpenEvent<I> event)
onOpen 在接口中 com.google.gwt.event.logical.shared.OpenHandler<I extends CmsLazyTreeItem>OpenHandler.onOpen(com.google.gwt.event.logical.shared.OpenEvent)void load(I target)
target - the tree item to be loaded