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/**
* 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.
*
*/
/**
* Use Yarn if available, it's much faster than the npm client.
* Return the version of yarn installed on the system, null if yarn is not available.
*/
export declare function getYarnVersionIfAvailable(): string | null;
/**
* Check if project is using Yarn (has `yarn.lock` in the tree)
*/
export declare function isProjectUsingYarn(cwd: string): string | undefined;
//# sourceMappingURL=yarn.d.ts.map