tooltipSvgTemplate on Cursor Modifier No Documentation to Change the tooltip

const cursorModifier = new CursorModifier({
crosshairStrokeThickness: 1,
showTooltip: true,
showAxisLabels: false
});
cursorModifier.tooltipSvgTemplate = (
seriesInfo: SeriesInfo[],
svgAnnotation: CursorTooltipSvgAnnotation
) => {
return <svg></svg>;
};
sciChartSurface.chartModifiers.add(cursorModifier);