Bug 266699 [CommonNavigator] Remove CommonDropAdapter.setCurrentOperation
This has been replaced by overrideOperation() which does the same thing. Note that setCurrentOperation() was added in M5 so it's never really been API yet.
bundles/org.eclipse.ui.navigator/src/org/eclipse/ui/navigator/CommonDropAdapter.java
* (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()
	 */
	public int getCurrentOperation() {
		return super.getCurrentOperation();
	}
	/**
	 * Goes away once JDT has hooked to overrideOperation
	 * @param operation 
	 * @since 3.4
	 */
	public void setCurrentOperation(int operation) {
		overrideOperation(operation);