docs: protected String replaceSimpleGroupNameVariables(String str, List<String> groupNames,
              List<String> groupValues, boolean debugPrint) {
          String result = str;
          int length = Math.min(groupNames.size(), groupValues.size());
          for (int i=0; i < length; i++) {
              if (groupNames  != null && groupNames.get(i)  != null &&
                  groupValues != null && groupValues.get(i) != null) {
                  result = result.replace("{"+groupNames.get(i)+"}", groupValues.get(i));
              }
          }
          if (debugPrint) {
              System.out.println("    In PostgreSQLBackend.replaceSimpleGroupNameVariables:");
              System.out.println("      str        : " + str);
              System.out.println("      groupNames : " + groupNames);
              System.out.println("      groupValues: " + groupValues);
              System.out.println("      result     : " + result);
          }
          return result;
      }