Possible to combine struts2-portlet-plugin and struts2-jfreechart-plugin?

[Per Johansson]

Hi,
In my development team we have just started to use the
struts2-portlet-plugin.
We want to create a portlet that renders a chart to include in a page, and
we try to use the struts2-jfreechart-plugin for this. So far no luck with
this.
Is it possible to create an action that is both a "portlet action"
extending struts-portlet-default, and a "jfree chart action" extending
jfreechart-default?
/Best regards, Per Johansson