/**
 * Copyright (c) Facebook, Inc. and its affiliates.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 */
type PreferredLanguage = 'javascript' | 'typescript';
type AskPreferredLanguageOptions = {
    fallback: PreferredLanguage | undefined;
    exit: boolean;
};
export declare function askPreferredLanguage(options?: Partial<AskPreferredLanguageOptions>): Promise<'javascript' | 'typescript'>;
export {};
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