This sample visualizes the product wise monthly sales revenue of the items sold by an online retailer in a year. The products are grouped based on the purchase domains and revenue is displayed as cell data.
In this example, you can see how to group axis labels. You can customize text in each level by using alignment, textStyle and border properties.
Border of the axis labels can be customized by using type property.
RectangleBraceWithoutTopBorderWithoutBottomBorderWithoutTopandBottomBorderWithoutBorder.