docs: public ThumborUrlBuilder crop(int top, int left, int bottom, int right) {
      if (top < 0) {
        throw new IllegalArgumentException("Top must be greater or equal to zero.");
      }
      if (left < 0) {
        throw new IllegalArgumentException("Left must be greater or equal to zero.");
      }
      if (bottom < 1 || bottom <= top) {
        throw new IllegalArgumentException("Bottom must be greater than zero and top.");
      }
      if (right < 1 || right <= left) {
        throw new IllegalArgumentException("Right must be greater than zero and left.");
      }
      hasCrop = true;
      cropTop = top;
      cropLeft = left;
      cropBottom = bottom;
      cropRight = right;
      return this;
    }