_onFabricMouseMove(fEvent) {
    const canvas = this.getCanvas();
    const pointer = canvas.getPointer(fEvent.e);

    this._line.set({
      x2: pointer.x,
      y2: pointer.y,
    });

    this._line.setCoords();

    canvas.renderAll();
  }
Mousemove event handler in fabric canvas
@param {{target: fabric.Object, e: MouseEvent}} fEvent - Fabric event object
@private