.
 <h2>Reconnect support</h2>
 <p>
 The <code>SseEventSource</code> supports automated recuperation from a connection loss, including
 negotiation of delivery of any missed events based on the last received  SSE event <code>id</code> field value, provided
 this field is set 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">"