/**
 * Event container subscription type
 */
export declare type EventContainerSubscription<EventArgType> = (arg: EventArgType) => void;
/**
 * Event container for event subscriptions.
 */
export declare class EventContainer<EventArgType = undefined> {
    private readonly subscriptions;
    /**
     * Subscribe to an event being fired.
     * @param subscription - Subscription.
     */
    subscribe(subscription: EventContainerSubscription<EventArgType>): void;
    /**
     * Unsubscribe to an event being fired.
     * @param subscription - Subscription.
     */
    unsubscribe(subscription: EventContainerSubscription<EventArgType>): void;
    /**
     * Fire an event.
     */
    fire(arg: EventArgType): void;
    private getIndex(subscription);
}