import { Observable } from '../Observable'; import { Subject } from '../Subject'; import { OperatorFunction } from '../types'; export declare function groupBy(keySelector: (value: T) => value is K): OperatorFunction | GroupedObservable>>; export declare function groupBy(keySelector: (value: T) => K): OperatorFunction>; export declare function groupBy(keySelector: (value: T) => K, elementSelector: void, durationSelector: (grouped: GroupedObservable) => Observable): OperatorFunction>; export declare function groupBy(keySelector: (value: T) => K, elementSelector?: (value: T) => R, durationSelector?: (grouped: GroupedObservable) => Observable): OperatorFunction>; export declare function groupBy(keySelector: (value: T) => K, elementSelector?: (value: T) => R, durationSelector?: (grouped: GroupedObservable) => Observable, subjectSelector?: () => Subject): OperatorFunction>; /** * An observable of values that is the emitted by the result of a {@link groupBy} operator, * contains a `key` property for the grouping. */ export interface GroupedObservable extends Observable { /** * The key value for the grouped notifications. */ readonly key: K; } //# sourceMappingURL=groupBy.d.ts.map