...
JfreeChart can render none as none, but can implement only one of the correct gradient styles (defined for series# 2,4,5). In our plugin implementation for JFreeChart we are accepting none as none. But for the series tags with non-none and correct gradient types defined, we accept the first not-none gradient type and then render the rest of the series with correct gradient types with that.
For example: we would render the series described above as:
* series1; : none
* series2; : VERTICAL
* series3; : none
* series4; : VERTICAL
* series5; : VERTICAL
* series6: none