export interface ISingleEventEmitterObserver<GValue> {
    (value: GValue): void;
}
export interface ISingleEventEmitterUnsubscribe {
    (): void;
}
export declare class SingleEventEmitter<GValue> {
    #private;
    constructor();
    get done(): boolean;
    get value(): GValue;
    get isEmpty(): boolean;
    emit(value: GValue): void;
    subscribe(emit: ISingleEventEmitterObserver<GValue>): ISingleEventEmitterUnsubscribe;
}