import { ISubscriptions, SubscriptionKeys } from '.';
/**
 * The pub/sub topic subscribe function.
 * @category Pub/Sub
 */
export type SubscribeFunction<T> = {
    /**
     * Subscribe to the topic.
     * @typeParam U - Any of the content types defined in {@link ISubscriptions}.
     * @param contentType - One of the content type defined in {@link ISubscriptions}.
     * @param callback - The callback when the content is received. callbacks' payload are defined in {@link ISubscriptions}.
     */
    <U extends SubscriptionKeys<T>>(contentType: U, callback: ISubscriptions<T>[U]): void;
};