I have a DataGrid with a custom ItemRenderer written as an
ActionScript class (that extends HBox).  I want the DataGrid to
display datatips for this column, but no datatips appear!

I've found a few "bugs" filed about this, but apparently this works as
designed:
https://bugs.adobe.com/jira/browse/SDK-9822
"Not a bug. It is the renderer's responsibility to deal with
dataTipFunction. This is for performance reasons."

So the question is...
How does a custom ItemRenderer deal with the dataTipFunction to create
/ display the datatip?

I know the ItemRenderer is responsible, so can someone give me an
example of how to fulfill this responsibility?  :)

Thanks!
Mike

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