ory_limit"><a href="#val-revision_history_limit" class="anchor"></a><code><span class="keyword">let</span> revision_history_limit: <a href="index.html#type-t">t</a> <span>=&gt;</span> option(int);</code></dt><dd><p>The number of old Replica_sets to retain to allow rollback. This is a pointer to distinguish between explicit zero and not specified. Defaults to 10.</p></dd></dl><dl><dt class="spec value" id="val-selector"><a href="#val-selector" class="anchor"></a><code><span class="keyword">let</span> selecto