it's indexed, docvalues can be constructed 
 on the fly (uninverted, aka fieldcache) on the first request to sort, facet, etc.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code><a href="http://lucene.apache.org/core/5_1_0/queries/org/apache/lucene/queries/function/ValueSource.html?is-external=true" title="class or interface in org.apache.lucene.queries.function">ValueSource</a></code></td>
<td class="colLast"><code><strong><a href="../../../../org/apache/solr/schema/TrieField.html#getValueS