import 'reflect-metadata';
/**
 * @SocketIO decorator
 * Injects the Socket.IO server instance into a property
 *
 * @example
 * ```typescript
 * @Service('chat')
 * export class ChatService {
 *   @SocketIO()
 *   private io: Server;
 *
 *   @OnMessage('announce')
 *   async handleAnnounce() {
 *     this.io.emit('announcement', 'Hello world!');
 *   }
 * }
 * ```
 */
export declare function SocketIO(): (target: any, propertyKey: string) => void;
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