code: public String getRatioHeightPercentage() {
  
          if (m_ratioHeightPercentage == null) {
  
              m_ratioHeightPercentage = calcRatioHeightPercentage(getScaler().getWidth(), getScaler().getHeight());
          }
          return m_ratioHeightPercentage;
      }
docs: Returns the image height percentage relative to the image width as a String.<p>
  
  In case a ratio has been used to scale the image, the height percentage is
  calculated based on the ratio, not on the actual image pixel size.
  This is done to avoid rounding differences.<p>
  
  @return the image height percentage relative to the image width