import * as i0 from "@angular/core";
export declare class Tasks {
    private idGenerator;
    private groups;
    currentTask: Task | undefined;
    once: Set<string>;
    queue(task: Task): void;
    private run;
    resetTimeouts(): void;
    queueOnce(task: Task & {
        name: string;
    }): void;
    waitForGroup(debounce: number): Thenable;
    private ensureGroup;
    static UI: number;
    static work: number;
    static background: number;
    static ɵfac: i0.ɵɵFactoryDeclaration<Tasks, never>;
    static ɵprov: i0.ɵɵInjectableDeclaration<Tasks>;
}
export type Task = {
    id?: number;
    name?: string;
    debounce?: number;
    func: () => any;
};
type Thenable = {
    then: (callback: () => any) => void;
};
export {};