Method init

demo/custom-markers/simple-point-marker.js:8–23

(group)

  }

  init(group) {
    this._group = group;

    // Vertical Line - create with default y and points, the real values
    // are set in fitToView().
    this._line = new Line({
      x:           0,
      y:           0,
      stroke:      this._options.color,
      strokeWidth: 1
    });

    group.add(this._line);

    this.fitToView();
  }

  fitToView() {
    const height = this._options.layer.getHeight();