el">Type Parameters:</span></dt>
<dd><code>S</code> - The generic type of the user identifier.</dd>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>message</code> - The push message object.</dd>
<dd><code>user</code> - The user to which the push message object must be delivered to.</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>The results of the send operation. If it returns an empty set, then there was no open web socket session
 associated with given socket channel and user. T