initRoughObjects() {
    this.roughSvg = document.getElementById(this.roughId);
    this.rcAxis = rough.svg(this.roughSvg, {
      options: {
        strokeWidth: this.axisStrokeWidth,
        roughness: this.axisRoughness,
      },
    });
    this.rc = rough.svg(this.roughSvg, {
      options: {
        fill: this.color,
        stroke: this.stroke === "none" ? undefined : this.stroke,
        strokeWidth: this.innerStrokeWidth,
        roughness: this.roughness,
        bowing: this.bowing,
        fillStyle: this.fillStyle,
      },
    });
  }
Draw rough SVG elements on chart.