Stacked Cluster Chart custom visual

To introduce a Stacked Cluster Chart custom visual combining column and stacked column charts to show side by side this and last year stacked values.

Business Case:

1/ Tracking monthly YTD sales and opportunities (in a stacked column) against This Year Annual Plan Sales (as a straight line).
2/ Comparing monthly YTD sales and opportunities (in a stacked column) to the corresponding YTD sales and opportunity last year (in a stacked column aside to a stacked sales & opportunity column of this month) and Last Year Annual Plan Sales (as a straight line).