@lru_cache(maxsize=<NUM_LIT:32>)<EOL><INDENT>def _identifier_data(self):<DEDENT>
<EOL>data = [ff.name for ff in self.files]<EOL>data.sort()<EOL>data.append(self.path.name)<EOL>data += self._identifier_meta()<EOL>return hash_obj(data)<EOL>
Return a unique identifier for the folder data