/**
 * Link existing to destination directory
 *
 * - If Node has been started with a module resolution strategy that does not
 *   resolve symlinks (so peerDependencies can be found), use symlinking.
 *   Symlinking may fail on Windows for non-Admin users.
 * - If not symlinking the entire directory, crawl the directory tree and
 *   hardlink all files (if possible), copying them if not.
 *
 * @param existingRoot    is the original file or directory to link.
 * @param destinationRoot is the new file or directory to create.
 */
export declare function link(existingRoot: string, destinationRoot: string): void;
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