Bug 89606 [Viewers] Remove protected API added to support prototype of grouping by working sets
bundles/org.eclipse.jface/src/org/eclipse/jface/viewers/AbstractTreeViewer.java
} else if (cp instanceof ITreeContentProvider) {
					ITreeContentProvider tcp = (ITreeContentProvider) cp;
					Object[] result = tcp.getChildren(parent);
					if (result != null) {
						return result;
					}
				}
			}
			return new Object[0];
		} finally {
			setBusy(oldBusy);
		}
	}
	/**
	 * Returns all selected items for the given SWT control.
	 *
	 * @param control
	 *            the control
	 * @return the list of selected items
	 */
	protected abstract Item[] getSelection(Control control);
	/*
	 * (non-Javadoc)
	 *
	 * @see org.eclipse.jface.viewers.StructuredViewer#getSelectionFromWidget()
	 */
	protected List getSelectionFromWidget() {
		Widget[] items = getSelection(getControl());
		ArrayList list = new ArrayList(items.length);
		for (int i = 0; i < items.length; i++) {