if (fAdapter.getViewer().getControl().isDisposed()) { return; }
	private void valueChanged(boolean on) {		IDebugModelPresentation presentation= fAdapter.getPresentation(JDIDebugModel.getPluginIdentifier());		presentation.setAttribute(JDIModelPresentation.DISPLAY_HEX_VALUES, new Boolean(on));		BusyIndicator.showWhile(fAdapter.getViewer().getControl().getDisplay(), new Runnable() {			public void run() {				fAdapter.getViewer().refresh();								}		});		setToolTipText(on ? DebugUIUtils.getResourceString(HIDE) : DebugUIUtils.getResourceString(SHOW));	}