Is there a framework/API/??? that Flex exposes that allows me to extend the Flex charting component library? For example, can I add a Radar chart to the library? Alternatively, assume, we did not have stacked bar charts, and wished to extend the bar charts available in Flex Charting. Is Flex Charting library open enough to allow me to do this? If so, can someone please point me to documentation that show how this is to be done?