boolean notShown= view == null; if (notShown) activePage.showView(viewId); return notShown;
boolean shown= view != null; if (shown != show) if (show) activePage.showView(viewId); else activePage.hideView(view); return shown;
	public static boolean showView(String viewId) throws PartInitException {		IWorkbenchPage activePage= getActivePage();		IViewReference view= activePage.findViewReference(viewId);		boolean notShown= view == null;		if (notShown)			activePage.showView(viewId);		return notShown;	}