How to use the @hpcc-js/leaflet-shim.D3SvgOverlay function in @hpcc-js/leaflet-shim

FeatureLayer.prototype.mixin(Utility.SimpleSelectionMixin);
FeatureLayer.prototype.publishReset(["layers"]);

//  ---------------------------------------------------------------------------
export class ClusterLayer extends FeatureLayer {

    constructor(cluster = true) {
        super(cluster);
    }
}
ClusterLayer.prototype._class += " map_ClusterLayer";

//  ---------------------------------------------------------------------------
export class D3SurfaceLayer extends FeatureLayer {

    protected _lfd3 = new D3SvgOverlay()
        .drawCallback((selection, projection) => this.layerUpdate(undefined, projection));

    hasBounds(): boolean {
        return true;
    }

    getBounds() {
        return this._lfd3.getBounds();
    }

    layerEnter(map: Map) {
        super.layerEnter(map);
        this.add(this._lfd3);
    }

    layerUpdate(map: Map, projection?) {