chart companion template class
XYChart companion
CategoryChart companion
no defaults in companion, consistent from peer
provide documentation macros as a trait
better doc macros integration for chart companion
RingChart now has proper companion
PieChart now has proper companion
MultiplePieChart now has proper companion
using JavaConverters for the subtitle iterator
provides a plot based companion factory method
workaround SI-8255
Merge branch 'wip-chart-companions' into develop