ends <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/util/Collection.html" title="class or interface in java.util" class="external-link">Collection</a>&lt;E&gt;,<wbr>E&gt;</code></div>
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<div class="block">A simple index on the elements of a <a href="../CollectionField.html" title="class in io.permazen.core"><code>CollectionField</code></a>.</div>
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<div class="col-first odd-row-color"><code>class&nbsp;</code></div>
<div class="col-second o