anchor.diff:  annotations are compiler or VM directives, decorators are actually plain
   functions, more precisely higher order functions.
   
  -NOTE: Higher order functions (HOF) are functions that process functions, i.e. that take 
  +NOTE: Higher order functions (HOF) are functions that process functions, i.e. that take
   a function as parameter, and may return a new function.
   
   A decorator is thus a function that take the function to decorate as parameter,
  
positive.code: This generic decorator can be used to easily implement condition checking,
  logging, locking, and so on. It can be more interesting if you want to provide
  several functionalities, instead of stacking more specific decorators, since
  stacking, or decorator composition, adds indirection levels and deepen the call 
  stack.
  
  //>>>
  
negative.code: This functionality is provided by the
  link:./golodoc/gololang/Decorators#withContext_context[`gololang.Decorators.withContext`]
  standard decorator. This decorator take a context, such as the one returned by
  link:./golodoc/gololang/Decorators#defaultContext_[`gololang.Decorators.defaultContext`]
  function.
  
  A context is an object with 4 defined methods:
  