import type { Observable } from '../../../external/rxjs/index.js';
/**
 * @function observationAsPromise
 * @param {Observable<unknown>} observable - an Array of Observables to use for this combined observation.
 * @param {Promise<condition>} condition - a method which should return true or false, if rejected or returning undefined the observation will result in a rejected Promise.
 * @description - Observes an Observable and returns a Promise that resolves when the condition returns true. If the condition returns undefined or rejects, the Promise will reject with the current value.
 * @returns {Promise<unknown>} - Returns a Promise which resolves when the condition returns true or rejects when the condition returns undefined or is rejecting it self.
 */
export declare function observationAsPromise<T>(observable: Observable<T>, condition: (value: T) => Promise<boolean | undefined>): Promise<T>;