Flex Imports Directives

Hello,

Just wondering whether the import directives for script has changed in Flex
4.10.

Currently, in my application, I have some imports as follows:

import flash.events.Event;
import mx.collections.ArrayCollection;
import mx.collections.ICollectionView;
import mx.controls.Alert;
import mx.events.CloseEvent;
import mx.managers.CursorManager;
import mx.managers.PopUpManager;
import mx.rpc.events.FaultEvent;
import mx.rpc.events.ResultEvent;
import mx.rpc.soap.mxml.WebService;

Are these imports still valid or are they already replaced with something?

fyi: the application still compiles good, but am just curious whether
there's better suggested ones. Thanks.

Angelo