values for the supplied key.
 </p>
 NOTE: This implementation ignores <code>null</code> values; A supplied value of <code>null</code> is ignored and not added to
 the purged value list. Overriding implementations may modify this behavior by redefining the
 <a href="#addFirstNull(java.util.List)"><code>addFirstNull(java.util.List)</code></a> method.</div>
<dl class="notes">
<dt>Specified by:</dt>
<dd><code><a href="MultivaluedMap.html#addFirst(K,V)">addFirst</a></code>&nbsp;in interface&nbsp;<code><a href="M