 by the server and the negotiation facility is supported by the server. In case of a connection loss,
 the last received SSE event <code>id</code> field value is sent in the
 <code><a href="../core/HttpHeaders.html#LAST_EVENT_ID_HEADER">"Last-Event-ID"</a></code> HTTP
 request header as part of a new connection request sent to the SSE endpoint. Upon a receipt of such reconnect request, the SSE
 endpoint that supports this negotiation facility is expected to replay all missed events. Note however, that this 