docs: public String readProperty(String propertyName) {
  
          String propVal = null;
          try {
              propVal = getCms().readPropertyObject(getParamResource(), propertyName, false).getValue();
          } catch (CmsException e) {
              if (LOG.isInfoEnabled()) {
                  LOG.info(e.getLocalizedMessage());
              }
          }
          if (CmsStringUtil.isEmpty(propVal)) {
              propVal = "";
          }
          return propVal;
      }