Bug 126658 [CommonNavigator] [DND] Complete definition of DND API
bundles/org.eclipse.ui.navigator/src/org/eclipse/ui/internal/navigator/extensions/NavigatorContentExtension.java
/**
	 * @return Returns the labelProviderInitializationFailed.
	 */
	public boolean hasLabelProviderInitializationFailed() {
		return labelProviderInitializationFailed;
	}
	/**
	 * 
	 * @return True if the loading of the content provider has failed.
	 */
	public boolean hasLoadingFailed() {
		return contentProviderInitializationFailed;
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.ui.internal.navigator.extensions.INavigatorContentExtension#isLoaded()
	 */
	public boolean isLoaded() {
		return contentProvider != null;
	}
	public void restoreState(IMemento aMemento) {
		synchronized (this) {
			appliedMemento = aMemento;
			applyMemento(contentProvider);
			applyMemento(labelProvider);
		}
	}
	public void saveState(IMemento aMemento) {
		synchronized (this) {