/**
   * Returns the boolean value of allowMumble properties. Only support "allowNull" and "allowBlank"
   * properties.
   *
   * <p>"allowMumble" properties has been removed ROM. However, to do conversion, still need to know
   * their values.
   *
   * @param param the parameter
   * @param propName either "allowNull" or "allowBlank".
   * @return <code>true</code> if the parameter allows the value. Otherwise <code>false</code>.
   */
  protected boolean getReportParamAllowMumble(
      AbstractScalarParameterHandle param, String propName) {
    if (ALLOW_NULL_PROP_NAME.equalsIgnoreCase(propName)
        || ALLOW_BLANK_PROP_NAME.equalsIgnoreCase(propName)) return !param.isRequired();

    assert false;
    return false;
  }