declare const _default: (instance: import('fastify').FastifyInstance<import('fastify').RawServerDefault, import('http').IncomingMessage, import('http').ServerResponse<import('http').IncomingMessage>, import('fastify').FastifyBaseLogger, import('fastify').FastifyTypeProviderDefault>, options: Record<never, never>) => Promise<void>;
export default _default;
export declare function transformAsyncIterable(source: AsyncIterable<MessageEvent>): AsyncIterable<string>;
interface MessageEvent {
    data?: string | object;
    id?: string;
    event?: string;
    retry?: number;
}