Bug 18486 Need documentation for startup extension point.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/browsing/JavaBrowsingContentProvider.java
private StructuredViewer fViewer;
	private Object fInput;
	private JavaBrowsingPart fBrowsingPart;
	
	public JavaBrowsingContentProvider(boolean provideMembers, JavaBrowsingPart browsingPart) {
		super(provideMembers, reconcileJavaViews());
		fBrowsingPart= browsingPart;
		fViewer= fBrowsingPart.getViewer();
		JavaCore.addElementChangedListener(this);
	}
	private static boolean reconcileJavaViews() {
		return JavaBasePreferencePage.reconcileJavaViews();
	}
	public Object[] getChildren(Object element) {
		if (!exists(element))
			return NO_CHILDREN;
			
		try {
			if (element instanceof Collection) {
				Collection elements= (Collection)element;
				if (elements.isEmpty())
					return NO_CHILDREN;
				Object[] result= new Object[0];
				Iterator iter= ((Collection)element).iterator();
				while (iter.hasNext()) {