Bug 257855 [CommonNavigator] Supporting Custom Transfertypes in Common Navigator Framework
bundles/org.eclipse.ui.navigator/src/org/eclipse/ui/navigator/CommonViewer.java
.getPipelineService();
	
			PipelinedViewerUpdate update = new PipelinedViewerUpdate();
			update.getRefreshTargets().add(element);
			update.setUpdateLabels(true);
			
			if (pipeDream.interceptUpdate(update)) {
				 
				for (Iterator iter = update.getRefreshTargets().iterator(); iter
						.hasNext();) {
					super.update(iter.next(), properties);
				}
			} else {
				super.update(element, properties);
			}
		} else {
			super.update(element, properties);
		}
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see java.lang.Object#toString()
	 */
	public String toString() {
		return contentService.toString() + " Viewer"; 
	}
	/*
	 * (non-Javadoc)
	 *