import { PubSubService } from "./pubsub-service.type";
/**
 * Message handler function.
 * Example usage:
 * ```
 * PubSub.subscribe('TEST_MESSAGE', (data, message, channel, handler) => {
 *   console.log(data);
 * });
 * ```
 */
export declare type MessageHandler<DataType, MessageType> = (data: DataType, message: MessageType, channel: PubSubService<MessageType>, handler: MessageHandler<DataType, MessageType>) => void;