import org.eclipse.core.commands.ExecutionException;
import org.eclipse.core.commands.IHandler;
import org.eclipse.core.commands.common.NotDefinedException;
-import org.eclipse.core.runtime.IStatus;
-import org.eclipse.core.runtime.Status;
import org.eclipse.jface.dialogs.MessageDialog;
import org.eclipse.jface.viewers.TreeSelection;
import org.eclipse.ui.IEditorInput;