import { ISODateString, ISODateTimeString } from "../metadata/ISODateTimeStrings";
export interface DataPoint {
    readonly created: ISODateString;
}
export declare type TimeReducer = (timestamp: ISODateString) => ISODateString;
export declare type DataPointsReducer<A extends DataPoint> = (timestamp: ISODateString, datapoints: ReadonlyArray<A>) => A;
export declare type EntryDatapointFactory<A> = (key: ISODateTimeString) => A;
export declare class Statistics {
    static compute<A extends DataPoint>(dataPoints: Iterable<A>, dataPointsReducer: DataPointsReducer<A>, emptyDatapointFactory: EntryDatapointFactory<A> | undefined, timeReducer?: TimeReducer): ReadonlyArray<A>;
}