code: public static void setResponseHeader (@Nonnull @Nonempty final String sName, @Nonnull @Nonempty final String sValue)
    {
      ValueEnforcer.notEmpty (sName, "Name");
      ValueEnforcer.notEmpty (sValue, "Value");
  
      s_aRWLock.writeLocked ( () -> s_aResponseHeaderMap.setHeader (sName, sValue));
  
    }
docs: Sets a response header to the response according to the passed name and
  value. An existing header entry with the same name is overridden.
  
  @param sName
  Name of the header. May neither be <code>null</code> nor empty.
  @param sValue
  Value of the header. May neither be <code>null</code> nor empty.