docs: def set_lexer_from_mime_type(self, mime, **options):
          """
          Sets the pygments lexer from mime type.
  
          :param mime: mime type
          :param options: optional addtional options.
          """
          self._lexer = get_lexer_for_mimetype(mime, **options)
          _logger().debug('lexer for mimetype (%s): %r', mime, self._lexer)