AggregationFnOption
Choice of aggregation function. Either "auto", the name of a built-in or registered fn (a String), or an AggregationFn value. Typed as Any? because Kotlin cannot model that mixed union.
Choice of aggregation function. Either "auto", the name of a built-in or registered fn (a String), or an AggregationFn value. Typed as Any? because Kotlin cannot model that mixed union.