In the documentation for SChartPointStyle it states: " You can also add a gradient to a point, so that it fades as you move out from its center." (cited from http://www.shinobicontrols.com/docs/ShinobiControls/ShinobiCharts/2.5.1/Standard/Normal/Classes/SChartPointStyle.html#//api/name/supplementStyleFromStyle:). Note that is from the docs for version 2.5.1. However in the same docs there is no property called 'gradient', not even one that says 'deprecated', yet in the version of the docs for 2.1.1 the property is listed there (http://www.shinobicontrols.com/docs/ShinobiControls/ShinobiCharts/2.1.1/Standard/Normal/Classes/SChartTheme.html). So it looks like this was meant to be deprecated but was just deleted completely from the framework, instead. Code that references, for example, line1.pointStyle.gradient will now throw an error rather than a warning as the property is not found at all.
By the way I ran into this issue while updating sample theme code sent from the ShinobiPlay app's theme builder. Is there any plan to update the ShinobiPlay app to produce current code (it doesn't currently compile as there are a ton of errors)? Themebuilder would be a really handy feature if it were updated.