public final void actionPerformed(AnActionEvent e) {
TreeExpander expander = getExpander(e.getDataContext());
if (expander == null) return;
if (!expander.canExpand()) return;
expander.expandAll();
}
public final void update(AnActionEvent event) {
Presentation presentation = event.getPresentation();
TreeExpander expander = getExpander(event.getDataContext());