Return true if chartType is one of Area subtypes. Subtypes set corresponds to the appropriate set in Powerpoint see Change Chart Type dialog in Powerpoint Area PercentsStackedArea PercentsStackedArea3D StackedArea StackedArea3D Area3D....to the appropriate set in PowerPoint (see “Change Chart Type”...Type” dialog in PowerPoint): Area, PercentsStackedArea, PercentsStackedArea3...