n operator">: </span><a href="../../../couchbase-lite/kotbase/-mutable-document/index.html">MutableDocument</a><span class="clearfix"><span class="floating-right">(<a href="https://github.com/jeffdgr8/kotbase/tree/main/couchbase-lite-ee-ktx/src/commonMain/kotlin/kotbase/ktx/DocumentExtensions.kt#L263">source</a>)</span></span></div><p class="paragraph">Set a Number value for the given key</p><span class="kdoc-tag"><h4 class="">Return</h4><p class="paragraph">this MutableDocument instance</p></span><h4 class