strokePath(vertices,
                  strokeColor = Config.DEFAULT_STROKE_COLOR,
                  strokeThickness = Config.DEFAULT_STROKE_THICKNESS) {
        if (vertices.length === 0) {
            return;
        }

        this.ctx.beginPath();
        this.ctx.moveTo(vertices[0].x, vertices[0].y);
        for (let p of vertices.slice(1)) {
            this.ctx.lineTo(p.x, p.y);
        }

        this.ctx.strokeStyle = strokeColor;
        this.ctx.lineWidth = strokeThickness;
        this.ctx.stroke();
    }
Draws a path.
@param {!(!Point[])} vertices
@param {!string=} strokeColor The stroke color.
@param {!number=} strokeThickness The stroke thickness.