title: TIntObjectHashMap - get Key for given value
body: <p>How to get the key from Trove TIntObjectHashMap for a value that exists and been found in the map ??</p>
  
  <pre><code>if(map.containsValue(source)) {
          for (Entry&lt;Integer, String&gt; entry : map.entrySet()) { // entrySet() is not recognized by Trove? and i can not find any corresponding method ??
              if (entry.getValue().equals(source)) {
                  entry.getKey();
          }
      }
  }
  </code></pre>