inline fun <T, K, M : MutableMap<in K, MutableList<T>>> MongoIterable<T>.groupByTo(destination: M, crossinline keySelector: (T) -> K): Minline fun <T, K, V, M : MutableMap<in K, MutableList<V>>> MongoIterable<T>.groupByTo(destination: M, crossinline keySelector: (T) -> K, crossinline valueTransform: (T) -> V): M