docs: private void parseConfig(String config) {
  
          if (isValidConfig(config)) {
              String[] conf = config.split("x");
              if (conf[0].trim().equals("?")) {
                  m_width = I_CmsFormatRestriction.DIMENSION_NOT_SET;
              } else {
                  m_width = CmsClientStringUtil.parseInt(conf[0]);
                  m_width = (m_width == 0) ? I_CmsFormatRestriction.DIMENSION_NOT_SET : m_width;
              }
              if (conf[1].trim().equals("?")) {
                  m_height = I_CmsFormatRestriction.DIMENSION_NOT_SET;
              } else {
                  m_height = CmsClientStringUtil.parseInt(conf[1]);
                  m_height = (m_height == 0) ? I_CmsFormatRestriction.DIMENSION_NOT_SET : m_height;
              }
          }
      }