e/MutableDocument.kt#L180">source</a>)</span></span></div><p class="paragraph">Set a boolean value for the given key</p><span class="kdoc-tag"><h4 class="">Return</h4><p class="paragraph">this MutableDocument instance</p></span><h4 class="">Parameters</h4><div class="table"><div class="table-row" data-filterable-current=":couchbase-lite:dokkaHtmlPartial/commonMain" data-filterable-set=":couchbase-lite:dokkaHtmlPartial/commonMain"><div class="main-subrow keyValue "><div class=""><span class="inline-flex"><di