export type Listener<Type extends string> = {
    /** Event type the listener is waiting for. */
    eventType: Type;
    /** Function to call on event. */
    callback: (...args: any[]) => void | Promise<void>;
    /** Unique identifier of the context in which the listener was created. */
    scopeKey?: string;
    /**
     * Unique identifier of the event group.
     *
     * Note: It is used if `listenForEvents` has been called with an array of event types.
     */
    eventGroupId?: string;
    /** Boolean indicating whether the listener should be called only once if the event occurs. */
    shouldBeCalledOnce?: boolean;
    /** Boolean indicating whether the listener has been called at least once. */
    hasBeenCalled?: boolean;
};
/** Event types used by the service. */
export type ServiceEventType<EventType extends string> = `${EventType}_INIT`;
export type Extend<Source, Target> = Exclude<Source, keyof Target> & Target;
export type CleanupFunction = () => void;