anchor.diff:  DSL
   
   Before we look at these two areas we start with a bit of background
  -information and looks at the concept from at a higher level using
  +information and looks at the concept from a higher level using
   diagrams. +
    Then we check out the first area how a client can initiate an
   Async message exchange and we also throw in the
  
positive.code: application can do other work simultaneously. +
   3. The client wants to get the reply so it uses the Future handle it
  got as _response_ from step 1. With this handle it retrieves the reply,
  wait if nessasary if the reply is not ready.
  
  [[Async-SynchronousRequestOnly]]
  Synchronous Request Only
  
negative.code: ScheduledExecutorService with 5 thread in the pool.
  
  |asyncSend |Future<Exchange> |Is used to send an async exchange to a Camel
  Endpoint. Camel will immediately return control to
  the caller thread after the task has been submitted to the executor
  service. This allows you to do other work while Camel processes the
  exchange in the other async thread.
  