Bug 264216 [CommonNavigator] DnD within a single object always shows as allowed
bundles/org.eclipse.ui.navigator/src/org/eclipse/ui/navigator/CommonDropAdapter.java
}
		}
		return false;
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.jface.viewers.ViewerDropAdapter#validateDrop(java.lang.Object,
	 *      int, org.eclipse.swt.dnd.TransferData)
	 */
	public boolean validateDrop(Object aDropTarget, int theDropOperation,
			TransferData theTransferData) {
		if (Policy.DEBUG_DND) {
			System.out.println("CommonDropAdapter.validateDrop (begin) operation: " + theDropOperation + " target: " + aDropTarget); 
		}
		boolean result = false;
		IStatus valid = null;
		if (super.validateDrop(aDropTarget, theDropOperation, theTransferData)) {
			result = true; 
			if (Policy.DEBUG_DND) {
				System.out
						.println("CommonDropAdapter.validateDrop valid for plugin transfer"); 
			}
		} else {
			Object target = aDropTarget != null ? aDropTarget : getViewer().getInput();
			if (Policy.DEBUG_DND) { 
				System.out.println("CommonDropAdapter.validateDrop target: " + target); 
				System.out.println("CommonDropAdapter.validateDrop local selection: " + 
						LocalSelectionTransfer.getTransfer().getSelection());
			}