anchor.diff:          _logger.warning(() => 'failed to clear cache entry for "$_key"', e, st);
           rethrow;
         }
  -      _logger.severe(
  +      _logger.finest(
           () => 'failed to clear cache entry for "$_key", ignoring error',
           e,
           st,
  
positive.code:         _logger.warning(() => 'failed to get cache entry for "$_key"', e, st);
          rethrow;
        }
        _logger.severe(
          () => 'failed to get cache entry for "$_key", returning "null"',
          e,
          st,
  
negative.code:         _logger.warning(() => 'failed to set cache entry for "$_key"', e, st);
          rethrow;
        }
        _logger.finest(
            () => 'failed to set cache entry for "$_key", ignoring error', e, st);
      }
      return value;
  