code: public CdnPathBuilder crop(int width, int height) {
          dimensionsGuard(width, height);
          sb.append("/-/crop/")
                  .append(width)
                  .append("x")
                  .append(height);
          return this;
      }
docs: Adds top-left-aligned crop.
  
  @param width Crop width
  @param height Crop height