How to use the jointjs.dia.Graph function in jointjs

mounted() {
    document.addEventListener('keydown', event => {
      moveShapeByKeypress(
        event.key,
        store.getters.highlightedShape,
        this.pushToUndoStack,
      );
    });

    this.graph = new dia.Graph();
    store.commit('setGraph', this.graph);
    this.graph.set('interactiveFunc', cellView => {
      return {
        elementMove: cellView.model.get('elementMove'),
      };
    });

    this.paperManager = PaperManager.factory(this.$refs.paper, this.graph.get('interactiveFunc'), this.graph);
    this.paper = this.paperManager.paper;

    this.handleResize();
    window.addEventListener('resize', this.handleResize);

    store.commit('setPaper', this.paperManager.paper);

    this.paperManager.addEventHandler('blank:pointerclick', () => {

beforeEach(() => {
        graph = new dia.Graph();
    });

beforeEach(() => {
      graph = new dia.Graph();
    });