is invoked once per each received event, <code>Throwable</code> consumer is invoked invoked upon a
 unrecoverable error encountered by a <a href="SseEventSource.html" title="interface in jakarta.ws.rs.sse"><code>SseEventSource</code></a>, onComplete callback is invoked after a successful
 connection and when there are no further events to be received. Note that the onComplete callback will not be
 invoked if the onError callback has been invoked.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></d