docs: @Override
    public final Boolean fromString(final Map<String, Object> pAddParam,
      final String pStrVal) throws Exception {
      if (pStrVal == null // HTTP checkbox return nothing if unchecked
        || "".equals(pStrVal) || "false".equals(pStrVal)
          || "off".equals(pStrVal)) {
        return Boolean.FALSE;
      }
      return Boolean.TRUE;
    }