t will mutate <a href="/api/store/interfaces/store/store/"><code>Store</code></a> data. If set to <code>false</code> (or omitted), such mutations will be silently ignored. All relevant mutator listeners (with this flag set to <code>true</code>) are called <em>before</em> any non-mutator listeners (since the latter may become relevant due to changes made in the former). The changes made by mutator listeners do not fire other mutating listeners, though they will fire non-mutator listeners.</p><section class="