_drawTrianglePath(type, linePosition) {
      const decorateSize = this.ctx.lineWidth * TRIANGLE_SIZE_RATIO;

      this._drawChevronPath(type, linePosition, decorateSize);
      this.ctx.closePath();
    }
Render Triangle Head
@param {string} type - 'head' or 'tail'
@param {Object} linePosition - line position
 @param {number} option.fromX - line start position x
 @param {number} option.fromY - line start position y
 @param {number} option.toX - line end position x
 @param {number} option.toY - line end position y
@private