[flexcoders] pass extra params to callback?

[chigwell23]

<mx:LineSeries id="mySeries"                                                    
lineSegmentRenderer="myLineRenderer">

This callback takes a LineSeriesSegment I think. What I want to do is
pass more information about the chart to it, as in

lineSegmentRenderer="myLineRenderer('mySeries','var1', 'var2')" 

and I expected this error:

Initializer for 'lineSegmentRenderer': cannot parse value of type
mx.core.IFactory from text 'myLineRenderer('mySeries')'.

Is there a way of doing this? TIA,

Mic.