import { Stream } from '@motorcycle/types';
/**
 * Flattens a stream of sinks into a single sink.
 *
 * @name switchSinkOr<Sinks, K extends keyof Sinks>(or$: Sinks[K], sinkName: K, sinks$: Stream<Sinks>): Sinks[K]
 * @example
 * import { switchSinkOr, map, now, never } from '@motorcycle/stream'
 *
 * const switchSinkOrNever = switchSinkOr(never())
 *
 * function Component(sources) {
 *   const { listOfItems$ } = sources
 *
 *  const sinks$ = map(items => SubComponent({ ...sources, items$: now(items) }), listOfItems$)
 *
 *  const history$ = switchSinkOrNever('history$', sinks$)
 *
 *  return { history$ }
 * }
 */
export declare const switchSinkOr: SwitchSinkOr;
export interface SwitchSinkOr {
    <Sinks extends {
        readonly [key: string]: Stream<any>;
    }, K extends keyof Sinks = keyof Sinks>(or$: Sinks[K], sinkName: K, sinks$: Stream<Sinks>): Sinks[K];
    <Sinks extends {
        readonly [key: string]: Stream<any>;
    }, K extends keyof Sinks = keyof Sinks>(or$: Sinks[K], sinkName: K): (sinks$: Stream<Sinks>) => Sinks[K];
    <Sinks extends {
        readonly [key: string]: Stream<any>;
    }, K extends keyof Sinks = keyof Sinks>(or$: Sinks[K]): (sinkName: K, sinks$: Stream<Sinks>) => Sinks[K];
    <Sinks extends {
        readonly [key: string]: Stream<any>;
    }, K extends keyof Sinks = keyof Sinks>(or$: Sinks[K]): (sinkName: K) => (sinks$: Stream<Sinks>) => Sinks[K];
}