Bug 18486 Need documentation for startup extension point.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/browsing/JavaBrowsingContentProvider.java
((TableViewer)fViewer).add(elements);
					if (fViewer.testFindItem(elements[0]) != null)
						fBrowsingPart.adjustInputAndSetSelection((IJavaElement)elements[0]);
					ctrl.setRedraw(true);
				}
			}
		});
	}
	private void postRemove(final Object element) {
		postRemove(new Object[] {element});
	}
	private void postRemove(final Object[] elements) {
		if (elements.length <= 0)
			return;
		
		postRunnable(new Runnable() {
			public void run() {
				Control ctrl= fViewer.getControl();
				if (ctrl != null && !ctrl.isDisposed()) {
					ctrl.setRedraw(false);
					if (fViewer instanceof AbstractTreeViewer)
						((AbstractTreeViewer)fViewer).remove(elements);
					else if (fViewer instanceof ListViewer)
						((ListViewer)fViewer).remove(elements);
					else if (fViewer instanceof TableViewer)
						((TableViewer)fViewer).remove(elements);
					ctrl.setRedraw(true);
				}
			}
		});