getItemsOnPoint(point) {
    const ret = [];

    if (this.labelModule.visible()) {
      if (pointInRect(this.labelModule.getSize(), point)) {
        ret.push({ nodeId: this.id, labelId: 0 });
      }
    }

    if (pointInRect(this.shape.boundingBox, point)) {
      ret.push({ nodeId: this.id });
    }

    return ret;
  }
Determine all visual elements of this node instance, in which the given
point falls within the bounding shape.
@param {point} point
@returns {Array.<nodeClickItem|nodeLabelClickItem>} list with the items which are on the point