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import java.util.List;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.osgi.util.TextProcessor;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.DisposeEvent;
import org.eclipse.swt.widgets.Tree;
import org.eclipse.swt.widgets.TreeItem;
import org.eclipse.jface.action.Action;
import org.eclipse.jface.action.IAction;
import org.eclipse.jface.action.IMenuManager;
TreeViewer treeViewer= (TreeViewer) viewer;
String matchName= ((ILabelProvider) treeViewer.getLabelProvider()).getText(element);
matchName= TextProcessor.deprocess(matchName);
if (matchName != null && matcher.match(matchName))
return true;