pan><span class="token operator"> = </span>null<span class="token punctuation">, </span></span><span class="parameter "><span class="token keyword">val </span>duration<span class="token operator">: </span><a href="https://kotlinlang.org/api/core/kotlin-stdlib/kotlin.time/-duration/index.html">Duration</a><span class="token operator">?</span><span class="token operator"> = </span>null</span></span><span class="token punctuation">)</span></div><p class="paragraph">Basic feature containing timed effect propert