import { Producer } from './types';
export declare function create<T>(f: (next: (x: T) => void, complete: (err?: any) => void) => void, onComplete?: (err?: any) => void): Producer<T>;
export declare function empty<T>(): Producer<T>;
export declare function never<T>(): Producer<T>;
export declare function throwError<T>(error: any): Producer<T>;