ts that need to be informed of the invalidation of other objects.&nbsp; To receive invalidation messages, the object must send a <b>registerForInvalidationNotification:</b> message to an object that may become invalid.&nbsp; An implementation of this method is provided in the NXInvalidationNotifier class, so objects that inherit from NXInvalidationNotifier (such as NXConnection) have the ability to notify other objects of their imminent demise.</font></td></tr>

</table>

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