anchor.diff:  handlers out of the box and allows to be extended with used defined ones.
   
   
  -=== Write to response
  +==== Write to response
   
   As you can observe from the previous example, no status code is provided, only the content. For
   send a complete response you can use a builtin response type or ring like hashmap:
  
positive.code: problems. It uses jvm not daemon threads for avoid shutdown the jvm.
  
  
  == Handlers
  
  The handlers is a fundamental piece of the _Catacumba_ library and this chapter intends
  to explain everything related to defult handlers.
  
  
  === What is a handler?
  
  As we have viewed in "Quick Start" section, a handler mainly consists in a simple function
  that acts on the handling context.
  
negative.code: from `(do-other-thing-with b)` expression.
  
  
  ==== Futures
  
  As previously explained promises are build on top of *CompletableFutures* of JDK8, _catacumba_ also
  supports the raw usage of them:
  