docs: public static void addResponseHeader (@Nonnull @Nonempty final String sName, @Nonnull @Nonempty final String sValue)
    {
      ValueEnforcer.notEmpty (sName, "Name");
      ValueEnforcer.notEmpty (sValue, "Value");
  
      s_aRWLock.writeLocked ( () -> s_aResponseHeaderMap.addHeader (sName, sValue));
    }