anchor.diff:  
   For completeness, together with the `Cache2kConfiguration` bean, it is also possible to use the Spring bean XML configuration.
   
  +=== Null Value Support
   
  +The cache abstraction of Spring is supporting `null` values. If the application relies on `null` storage this has to be
  +enabled, e.g. via `Cache2kBuilder.permitNullValues(true)`, see <<null-values,Null Values>>.
  
positive.code: [[spring]]
  == Spring Integration
  
  === Enable Cache2k Spring Support
  
  
negative.code:       .addCaches(
          b->b.name("countries"),
          b->b.name("test1").expireAfterWrite(30, TimeUnit.SECONDS).entryCapacity(10000),
          b->b.name("anotherCache").entryCapacity(1000)).permitNullValues(true);
    }
  ----
  
  