lt;</span><span class="type"><a href="/api/store/interfaces/store/store/">Store</a></span><span class="operator">></span></code></td><td><p>The function that will be called whenever an attempt to write invalid data to the matching <a href="/api/store/type-aliases/store/cell/"><code>Cell</code></a> was made.</p></td></tr><tr><th><code>mutator<span class="operator">?</span></code></th><td><code><span class="builtin">boolean</span></code></td><td><p>An optional boolean that indicates that the listener mutates 