import TypedEmitter from 'typed-emitter';
export declare type Unsubscriber = () => void;
declare const Emitter_base: new <T_1>() => Omit<TypedEmitter<T_1>, "on">;
/**
 * This class wraps TypedEmitter, which is a typescript overlay on
 * the standard EventEmitter class; typings only, no code
 */
export declare class Emitter<T> extends Emitter_base<T> {
    on<E extends (string | symbol) & keyof T>(event: E, listener: T[E]): Unsubscriber;
}
export {};