aggregateOfRow
internal fun <T, V, R> Aggregator<V & Any, R>.aggregateOfRow(row: DataRow<T>, columns: ColumnsSelector<T, V>): R
Generic function to apply an Aggregator (this) to aggregate values of a row.
Aggregator.aggregateCalculatingValueType is used to deal with mixed types.
Parameters
row
a row to aggregate
columns
selector of which columns inside the row to aggregate