n/kotbase/MutableDocument.kt#L117">source</a>)</span></span></div><p class="paragraph">Set an object value by key. Allowed value types are List, Date, Map, Number, null, String, Array, Blob, and Dictionary. If present, Lists, Maps and Dictionaries may contain only the above types. A Date object will be converted to an ISO-8601 format string.</p><span class="kdoc-tag"><h4 class="">Return</h4><p class="paragraph">this Document instance</p></span><h4 class="">Parameters</h4><div class="table"><div class="table