Bug 141192 [Viewers] Javadoc change about multiple equal elements in StructuredViewer and AbstractTreeViewer
bundles/org.eclipse.jface/src/org/eclipse/jface/viewers/AbstractTreeViewer.java
if (element != null) {
					w = internalExpand(element, false);
					if (w instanceof Item) {
						newSelection.add(w);
					}
				}
            }
        }
        setSelection(newSelection);
        
        
        
        
        
        if (reveal && newSelection.size() > 0) {
            showItem((Item) newSelection.get(0));
        }
    }
    /**
     * Shows the given item.
     * 
     * @param item
     *           the item
     */
    protected abstract void showItem(Item item);
    /**
     * Updates the tree items to correspond to the child elements of the given
     * parent element. If null is passed for the children, this method obtains
     * them (only if needed).
     *