e JavaScript listener function declared in
 <code>&lt;f:websocket onmessage&gt;</code>.</div>
<dl class="notes">
<dt>Type Parameters:</dt>
<dd><code>S</code> - The generic type of the user identifier.</dd>
<dt>Parameters:</dt>
<dd><code>message</code> - The push message object.</dd>
<dd><code>users</code> - The users to which the push message object must be delivered to.</dd>
<dt>Returns:</dt>
<dd>The results of the send operation grouped by user. If it contains an empty set, then there was no open web
 soc