public CachingLiquidASTGenerator(ILiquidASTGenerator generator, int slidingExpirationSeconds = 300)
 {
     _slidingExpiration = TimeSpan.FromSeconds(slidingExpirationSeconds);
     _generator         = generator;
 }
 public CachingLiquidASTGenerator(ILiquidASTGenerator generator, int slidingExpirationSeconds = 300)
 {
      _slidingExpiration = TimeSpan.FromSeconds(slidingExpirationSeconds);
     _generator = generator;
 }