> type describes a function that is used to listen to changes to the <a href="/api/indexes/type-aliases/concept/slice/"><code>Slice</code></a> <a href="/api/common/type-aliases/identity/ids/"><code>Ids</code></a> in an <a href="/api/indexes/type-aliases/concept/index/"><code>Index</code></a>. <a href="/api/indexes/type-aliases/listener/sliceidslistener/">Read more</a>.</p></section></section>