d value of <code>null</code> is ignored and not added to
 the purged value list. As a result of such operation, empty value list would be registered for the supplied key.
 Overriding implementations may modify this behavior by redefining the <a href="#addNull(java.util.List)"><code>addNull(java.util.List)</code></a> method.</div>
<dl class="notes">
<dt>Specified by:</dt>
<dd><code><a href="MultivaluedMap.html#putSingle(K,V)">putSingle</a></code>&nbsp;in interface&nbsp;<code><a href="MultivaluedMap.html" tit