{"ast_node_type":"other","tokens":[{"end":74,"kind":"keyword","start":0,"text":"//"}]}
    // We acquire a shared lock on the lock file of the directory, so that
fn copy_files(sess: &Session, target_dir: &Path, source_dir: &Path) -> Result<bool, ()> {
    // nobody deletes it out from under us while we are reading from it.