Add missing types for PlotData: groupnorm, stackgaps (#48623)
Add missing types for PlotData: groupnorm, stackgaps (#48623)


georgemarshall/DefinitelyTyped,georgemarshall/DefinitelyTyped,mcliment/DefinitelyTyped,georgemarshall/DefinitelyTyped,georgemarshall/DefinitelyTyped,markogresak/DefinitelyTyped