import 'reflect-metadata';
/**
 * @OnMessage decorator
 * Defines a handler for a specific message type
 *
 * @param messageType - The type of message this handler processes
 *
 * @example
 * ```typescript
 * @OnMessage('send_message')
 * async handleSendMessage(socket: Socket, data: any, clientId: string) {
 *   // Handle the message
 * }
 * ```
 */
export declare function OnMessage(messageType: string): (target: any, propertyKey: string, descriptor: PropertyDescriptor) => PropertyDescriptor;
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