apply_udaf.scala

// Taken From: https://github.com/apache/spark/blob/master/sql/core/src/main/scala/org/apache/spark/sql/expressions/udaf.scala#L128-L136

  @scala.annotation.varargs
  def apply(exprs: Column*): Column = {
    val aggregateExpression =
      AggregateExpression(
        ScalaUDAF(exprs.map(_.expr), this),
        Complete,
        isDistinct = false)
    Column(aggregateExpression)
  }