Bug 126658 [CommonNavigator] [DND] Complete definition of DND API
bundles/org.eclipse.ui.navigator/src/org/eclipse/ui/internal/navigator/NavigatorContentService.java
}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.ui.internal.navigator.INavigatorContentService#createCommonLabelProvider()
	 */
	public ILabelProvider createCommonLabelProvider() {
		if (labelProviderInitialized)
			return labelProvider;
		synchronized (this) {
			if (labelProvider == null)
				labelProvider = new NavigatorContentServiceLabelProvider(this);
			labelProviderInitialized = true;
		}
		return labelProvider;
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.ui.navigator.INavigatorContentService#createCommonDescriptionProvider()
	 */
	public IDescriptionProvider createCommonDescriptionProvider() {
		if (descriptionProvider != null)
			return descriptionProvider;
		synchronized (this) {
			if (descriptionProvider == null)
				descriptionProvider = new NavigatorContentServiceDescriptionProvider(
						this);
		}
		return descriptionProvider;