code: function (ctx, rect) {
          var style = this.style;
  
          rect = style.textRect || rect;
  
          // Optimize, avoid normalize every time.
          this.__dirty && textHelper.normalizeTextStyle(style, true);
  
          var text = style.text;
  
          // Convert to string
          text != null && (text += '');
  
          if (!textHelper.needDrawText(text, style)) {
              return;
          }
  
          // FIXME
          // Do not provide prevEl to `textHelper.renderText` for ctx prop cache,
          // but use `ctx.save()` and `ctx.restore()`. Because the cache for rect
          // text propably break the cache for its host elements.
          ctx.save();
  
          // Transform rect to view space
          var transform = this.transform;
          if (!style.transformText) {
              if (transform) {
                  tmpRect.copy(rect);
                  tmpRect.applyTransform(transform);
                  rect = tmpRect;
              }
          }
          else {
              this.setTransform(ctx);
          }
  
          // transformText and textRotation can not be used at the same time.
          textHelper.renderText(this, ctx, text, style, rect, WILL_BE_RESTORED);
  
          ctx.restore();
      }
docs: Draw text in a rect with specified position.
  @param  {CanvasRenderingContext2D} ctx
  @param  {Object} rect Displayable rect