Bug 320142 Editors no longer activate when clicking on their tabs
bundles/org.eclipse.e4.ui.workbench/src/org/eclipse/e4/ui/internal/workbench/ModelServiceImpl.java
}
		}
		if (parent != null) {
			
			if (!element.isToBeRendered())
				element.setToBeRendered(true);
			((MElementContainer<MUIElement>) parent).setSelectedElement(element);
			bringToTop(window, parent);
		}
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see
	 * org.eclipse.e4.ui.workbench.modeling.EModelService#findPlaceholderFor(org.eclipse.e4.ui.model
	 * .application.ui.basic.MWindow, org.eclipse.e4.ui.model.application.ui.MUIElement)
	 */
	public MPlaceholder findPlaceholderFor(MWindow window, MUIElement element) {
		List<MPerspectiveStack> psList = findElements(window, null, MPerspectiveStack.class, null);
		if (psList.size() != 1)
			return null;
		MPerspectiveStack pStack = psList.get(0);
		MPerspective persp = pStack.getSelectedElement();
		if (persp == null)
			return null;
		List<MPlaceholder> phList = findElements(persp, null, MPlaceholder.class, null);
		for (MPlaceholder ph : phList) {
			if (ph.getRef() == element)
				return ph;
		}