return new Ax.ext.view.d3.sankey.Builder()
    .setSourceColumn("source")
    .setTargetColumn("target")
    .setValueColumn("value")
    .setWidth(1920)
    .setHeight(1200)
    .setMarginTop(15)
    .setMarginRight(15)
    .setMarginBottom(15)
    .setMarginLeft(15)
    .setUnitPosition( Ax.ext.view.d3.sankey.UnitPosition.RIGHT)
    .setUnit("kWh")
    //.setColors(["#FF0000", "#445566", "rgb(255,35,65)"])
    .setColorFormat(Ax.ext.view.d3.sankey.ColorFormat.INTERPOLATE)
    .setLinkStrokeOpacity(0.5)
    .setLinkHoverOpacity(0.8)
    .setAlign(Ax.ext.view.d3.sankey.Align.JUSTIFY)
    .setNodeWidth(20)
    .setNodeStrokeWidth(1)
    .setNodeStrokeOpacity(1)
    .setNodePadding(10)
    .setNodeLabelPadding(6)
    .build();