export declare const LOGIN_WINDOW_NAME = "twilioFlexLoginWindow";
export declare const LOGIN_SUCCESSFUL_MESSAGE = "TWILIO_FLEX_LOGIN_SUCCESSFUL";
export declare function stringifyLoginWindowFeatures(features: {
    [k: string]: any;
}): string;
export declare function getDefaultLoginWindowFeatures(): Record<string, string | number>;
/**
 * Replace reserved params from query string
 * Example: http://localhost/?Token=foo&A=1&Identity=batman will changed to http://localhost/?A=1
 * @private
 */
export declare function sanitizeTokenParams(s: string): string;
export declare function listenForExternalTokenChange(): void;
export declare function redirectIfNoReferrer(redirectUrl: string): void;