@pimms.require<EOL><INDENT>def setup_cache_deletion(cache_path, actual_cache_path, cache_delete):<DEDENT>
if cache_delete is True and cache_path is actual_cache_path:<EOL><INDENT>atexit.register(shutil.rmtree, cache_path)<EOL><DEDENT>return True<EOL>
The filemap.setup_cache_deletion requirement ensures that the cache directory will be
deleted at system exit, if required.