code: def expose_request(func):
      
      if not python.callable(func):
          raise TypeError("func must be callable")
  
      if isinstance(func, types.UnboundMethodType):
          setattr(func.im_func, '_pyamf_expose_request', True)
      else:
          setattr(func, '_pyamf_expose_request', True)
  
      return func
docs: A decorator that adds an expose_request flag to the underlying callable.
  
      @raise TypeError: C{func} must be callable.