code: @Override
    public final StringBuffer revealPageFilterData(
      final Map<String, Object> pAddParam, final IRequestData pRequestData,
        final Class<?> pEntityClass) throws Exception {
      return this.hlpEntitiesPage.revealPageFilterData(
        pAddParam, pRequestData, pEntityClass, this.isDbgSh);
    }
docs: <p>Retrieve page filter data like SQL where and filter map.
  It's used in other services e.g. PrcAssignItemsToCatalog.</p>
  @param pAddParam additional param to return revealed data
  @param pRequestData - Request Data
  @param pEntityClass Entity Class
  @return StringBuffer with empty string "" or one like "ITSID=12"
  @throws Exception - an Exception