anchor.diff:  
   Here is the Makefile for the `simple` example:
   
  ----------------------------------
  -    make
  +[source,makefile]
  +---------------------------------
       BSVDIR=../../bsv
       S2H = SimpleRequest
       H2S = SimpleIndication
  
positive.code: 
  Implement subclasses of the wrapper in order to define the callbacks
  
  ---------------------------------
      class SimpleIndication : public SimpleIndicationWrapper
      {  
  
negative.code: 
  Now the software invokes hardware methods via the proxy:
  
  [source,C]
  ---------------------------------
      device->say1(v1a);  
  
  