code: public final void setCustomResponseHeaders (@Nullable final HttpHeaderMap aOther)
    {
      m_aResponseHeaderMap.removeAll ();
      if (aOther != null)
        m_aResponseHeaderMap.setAllHeaders (aOther);
    }
docs: Set many custom headers at once. All existing headers are unconditionally
  removed.
  
  @param aOther
  The headers to be set. May be <code>null</code>.