n">(</span><span class="parameters "><span class="parameter ">topic<span class="token operator">: </span><a href="https://kotlinlang.org/api/latest/jvm/stdlib/kotlin-stdlib/kotlin/-string/index.html">String</a><span class="token punctuation">, </span></span><span class="parameter ">observer<span class="token operator">: </span><a href="../../com.amazonaws.services.chime.sdk.meetings.realtime.datamessage/-data-message-observer/index.html">DataMessageObserver</a></span></span><span class="token punctuation">)