Java: What should be done to use TreeBidiMap?
<p>I want to use <a href="http://commons.apache.org/collections/api-release/org/apache/commons/collections/bidimap/TreeBidiMap.html" rel="nofollow">this class</a>. </p>

<p>Netbeans is rejecting the declaration:</p>

<pre><code>import org.apache.commons.collections.bidimap.TreeBidiMap;
</code></pre>

<p>What should be done?</p>
