How to use the cwl-svg.DeletionPlugin function in cwl-svg

drawGraphAndAttachListeners() {

        this.graph = new Workflow({
            svgRoot: this.canvas.nativeElement as SVGSVGElement,
            model: this.model as any,
            plugins: [
                new SVGArrangePlugin(),
                new SVGPortDragPlugin(),
                new SVGNodeMovePlugin(),
                new SVGEdgeHoverPlugin(),
                new SVGValidatePlugin(),
                new SelectionPlugin(),
                new ZoomPlugin(),
                new DeletionPlugin(),
                new UpdatePlugin()
            ],
            editingEnabled: !this.readonly
        });

        try {
            this.graph.fitToViewport();
        } catch (ex) {
            setTimeout(() => {
                console.warn("Workflow should be able to fit in by now...");
                try {
                    this.graph.fitToViewport();
                    this.draw.emit(this);
                    this.functionsWaitingForRender.forEach(fn => fn());
                    this.functionsWaitingForRender = undefined;