@property<EOL><INDENT>def last_written_time(self):<DEDENT>
if self._last_written_time is None:<EOL><INDENT>return dfdatetime_semantic_time.SemanticTime('<STR_LIT>')<EOL><DEDENT>return dfdatetime_filetime.Filetime(timestamp=self._last_written_time)<EOL>
dfdatetime.DateTimeValues: last written time.