export interface Listener<T, S = void, U = void> {
    (...event: [T, S, U]): any;
}
export interface Disposable {
    dispose: () => void;
}
export declare const ErrorAlreadyDisposed: Error;
/** passes through events as they happen. You will not get events from before you start listening */
export declare class TypedEvent<T, S = void, U = void> {
    #private;
    constructor();
    dispose(): void;
    on(listener: Listener<T, S, U>): Disposable;
    once(listener: Listener<T, S, U>): void;
    off(listener: Listener<T, S, U>): void;
    emit(...event: [T, S, U]): void;
}