/**
 * Removes all directories in a folder that aren't in the provided allowlist
 * Supports nested directory paths like 'foo/bar/baz'
 *
 * @param folderPath - The path to the folder to process
 * @param allowedDirs - Array of relative directory paths to keep
 * @returns Promise that resolves when all operations are complete
 */
export declare function removeUnlistedDirectories(folderPath: string, allowedDirs: string[]): Promise<void>;