Function symlink_dir 

pub fn symlink_dir<P: AsRef<Path>, Q: AsRef<Path>>(original: P, link: Q)

Create a new symbolic link to a directory.

Removing the symlink

• On Windows, a symlink-to-directory needs to be removed with a corresponding fs::remove_dir and not fs::remove_file.
• On Unix, remove the symlink with fs::remove_file.