bsp;<span class="identifier">T</span><span class="symbol">&gt;</span> <a href="-data-frame/index.html"><span class="identifier">DataFrame</span></a><span class="symbol">.</span><span class="identifier">unfold</span><span class="symbol">(</span><span class="identifier" id="krangl$unfold(krangl.DataFrame, kotlin.String, kotlin.collections.List((kotlin.String)), kotlin.Boolean)/columnName">columnName</span><span class="symbol">:</span>&nbsp;<a href="https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-string/i