Bug 264216 [CommonNavigator] DnD within a single object always shows as allowed
bundles/org.eclipse.ui.navigator/src/org/eclipse/ui/navigator/CommonDropAdapter.java
System.out
					.println("CommonDropAdapter.validateDrop (returning " + (valid != null ? valid.getSeverity() + ": " + valid.getMessage() : "" + result) + ")"); 
		}
		setScrollExpandEnabled(true);
		return result;
	}
	/*
	 * The visibility of the following methods is raised for downstream clients
	 * (assistants).
	 */
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.jface.viewers.ViewerDropAdapter#getBounds(org.eclipse.swt.widgets.Item)
	 */
	public Rectangle getBounds(Item item) {
		return super.getBounds(item);
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.jface.viewers.ViewerDropAdapter#getCurrentLocation()
	 */
	public int getCurrentLocation() {
		return super.getCurrentLocation();
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.jface.viewers.ViewerDropAdapter#getCurrentOperation()