import type { Subscribable, SubscribableValue } from './types/inputs/Subscribable.js';
import type { MappingKey } from './types/mapping.js';
import type { ListenEventMap, StrictListenable } from './types/outputs/StrictListenable.js';
/**
 * Returns a promise resolving to next emitted result, or reject to the next error
 * @param observable
 *
 * @since 1.0.0
 */
export declare function waitFor$<O extends Subscribable>(observable: O): Promise<SubscribableValue<O>>;
export declare function waitFor$<L extends StrictListenable, K extends MappingKey<ListenEventMap<L>>>(listenable: L, key: K): Promise<ListenEventMap<L>[K]>;