code: def mimes(self):
          
          _mimes = MimeTypes(strict=False)
          _mimes.suffix_map.update({'.tbz2': '.tar.bz2'})
          _mimes.encodings_map.update({'.bz2': 'bzip2'})
  
          if cfg['CFG_BIBDOCFILE_ADDITIONAL_KNOWN_MIMETYPES']:
              for key, value in iteritems(
                      cfg['CFG_BIBDOCFILE_ADDITIONAL_KNOWN_MIMETYPES']):
                  _mimes.add_type(key, value)
                  del key, value
  
          return _mimes
docs: Returns extended MimeTypes.