/**
 * Task:
 *
 * Empties the given directory but to avoid the case where you accidentally
 * delete the user directory or a root directory or everything in the current
 * directory, we prevent certain types of directories from being emptied.
 *
 * Specifically, you cannot delete:
 *
 * - any directory starting with "~"
 * - any directory starting with "/"
 * - The "" directory
 * - The "./" directory
 */
export declare function emptyDir(dir: string): void;