Bug 320285 Messages inteneded for developers in the error log
The message "unsupported: isEditorAreaVisible" appears in the error log during the normal run of e4 SDK. (For instance, starting the e4 SDK on an clean workspace produces two of those messages.)
bundles/org.eclipse.e4.ui.workbench/src/org/eclipse/e4/ui/internal/workbench/ModelServiceImpl.java
public <T> List<T> findElements(MUIElement searchRoot, String id, Class<T> clazz,
			List<String> tagsToMatch) {
		List<T> elements = new ArrayList<T>();
		findElementsRecursive(searchRoot, id, clazz, tagsToMatch, elements);
		return elements;
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.e4.ui.workbench.modeling.EModelService#find(java.lang.String,
	 * org.eclipse.e4.ui.model.application.MElementContainer)
	 */
	public MUIElement find(String id, MUIElement searchRoot) {
		if (id == null || id.length() == 0)
			return null;
		List elements = findElements(searchRoot, id, null, null);
		if (elements.size() > 0)
			return (MUIElement) elements.get(0);
		return null;
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see
	 * org.eclipse.e4.ui.workbench.modeling.EModelService#getContainingContext(org.eclipse.e4.ui
	 * .model .application.MUIElement)
	 */
	public IEclipseContext getContainingContext(MUIElement element) {
		MUIElement curParent = null;
		if (element.getCurSharedRef() != null)