import { Task } from './Task';
export declare function isAsyncTask(task: Task | AsyncTask): task is AsyncTask;
export declare class AsyncTask {
    isAsync: boolean;
    isExecuting: boolean;
    private readonly id;
    private readonly handler;
    private readonly errorHandler;
    constructor(id: string, handler: (taskId?: string, jobId?: string) => Promise<unknown>, errorHandler?: (err: Error) => void);
    execute(jobId?: string): void;
    executeAsync(jobId?: string): Promise<unknown>;
}