/*!
 * Copyright (c) Microsoft Corporation. All rights reserved.
 * Licensed under the MIT License.
 */
/**
 * @hidden
 * 'ws' middleware to validate the client protocol version when processing a connection upgrade request.
 * @param info 'ws' request information
 * @param cb 'ws' verification callback
 */
export declare function verifyClient(info: any, cb: (verified: boolean, code?: number, message?: string) => any): any;
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