import 'reflect-metadata';
/**
 * @JoinRoom decorator
 * Automatically joins the socket to a room when the handler is executed
 *
 * @param room - The room name to join (can be a string or a function that returns the room name)
 *
 * @example
 * ```typescript
 * @OnMessage('join_chat')
 * @JoinRoom('chat_room')
 * async handleJoinChat(socket: Socket, data: any) {
 *   // socket has already joined 'chat_room'
 * }
 * ```
 */
export declare function JoinRoom(room: string | ((data: any) => string)): (target: any, propertyKey: string, descriptor: PropertyDescriptor) => PropertyDescriptor;
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