ss="external-link">NavigableSet</a>&lt;<a href="ObjId.html" title="class in io.permazen.core">ObjId</a>&gt;&nbsp;referrers,
 V&nbsp;oldValue,
 V&nbsp;newValue)</code></div>
<div class="col-last even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab3">
<div class="block">Receive notification of a change in the value of a <a href="SimpleField.html" title="class in io.permazen.core"><code>SimpleField</code></a> in an object.</div>
</div>
</div>
</div>
</div>
</section>
</li>
</u