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Document deallocation notifications

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Documentation/gsdoc/NSObject.gsdoc
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@ -568,6 +568,56 @@
<desc>
</desc>
</method>
<method type="BOOL">
<sel>deallocNotificationsActive</sel>
<desc>
<p>
Returns a boolean indicating whether deallocation notification
has been turned on.
</p>
<p>
If deallocation notification is turned on, whenever an objects
retain count reaches zero (and it would normally be deallocated)
the <em>_dealloc</em> methiod is called and the object is only
deallocated if that method returns YES.
</p>
</desc>
</method>
<method type="void">
<sel>setDeallocNotificationsActive:</sel>
<arg type="BOOL">flag</arg>
<desc>
<p>
Turns on (or off) deallocation notification.
</p>
<p>
If deallocation notification is turned on, whenever an objects
retain count reaches zero (and it would normally be deallocated)
the <em>_dealloc</em> methiod is called and the object is only
deallocated if that method returns YES.
</p>
</desc>
</method>
<method type="BOOL">
<sel>_dealloc</sel>
<desc>
<p>
Returns a boolean indicating whether the receiver should be
deallocated or not. The default implementation returns YES.
</p>
<p>
This method is called when an objects retain count reaches
zero (if deallocation notifications are active).
</p>
<p>
This method is provided so that you can take some sort of
action when objects are deallocated ... normally you would
override this method in your classes, but you could also
override it in a category of NSObject - and perform some
action whenever <em>any</em> object is deallocated.
</p>
</desc>
</method>
</class>
</chapter>
</body>