tlin.Function2((krangl.ExpressionContext, , kotlin.Any)))"></a>
<code><span class="keyword">open</span> <span class="keyword">fun </span><span class="identifier">addColumn</span><span class="symbol">(</span><span class="identifier" id="krangl.DataFrame$addColumn(kotlin.String, kotlin.Function2((krangl.ExpressionContext, , kotlin.Any)))/columnName">columnName</span><span class="symbol">:</span>&nbsp;<a href="https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-string/index.html"><span class="identifier">Stri