AggregateFieldRepresents an aggregation that can be performed by Firestore. class AggregateField<T> {readonly aggregateType: AggregateType;readonly type: string;}§Type Parameters§T[src]§Properties§aggregateType: AggregateType[src]Indicates the aggregation operation of this AggregateField. §type: string[src]A type string to uniquely identify instances of this class.