import { Duplex } from 'stream';
export interface IUpgradeError {
    /**
     * Terminates the WebSocket connection by sending an error response and closing the socket.
     * @param {Duplex} socket - The WebSocket duplex stream.
     * @returns {boolean} True if the connection was terminated successfully, false otherwise.
     */
    terminateConnection(socket: Duplex): boolean;
}