import { Observable } from 'rxjs';
import { TestMessages } from './types';
import { TestScheduler } from 'rxjs/testing';
export declare class Scheduler {
    static instance: TestScheduler | null;
    static init(): void;
    static get(): TestScheduler;
    static reset(): void;
    static materializeInnerObservable(observable: Observable<any>, outerFrame: number): TestMessages;
}