src/cm/media/js/lib/yui/yui3-3.15.0/build/series-areaspline-stacked/series-areaspline-stacked-min.js
add some more custom config and put every thing in comment in the custom.yaml template
YUI.add("series-areaspline-stacked",function(e,t){e.StackedAreaSplineSeries=e.Base.create("stackedAreaSplineSeries",e.AreaSeries,[e.CurveUtil,e.StackingUtil],{drawSeries:function(){this._stackCoordinates(),this.drawStackedAreaSpline()}},{ATTRS:{type:{value:"stackedAreaSpline"}}})},"@VERSION@",{requires:["series-stacked","series-areaspline"]});