code: def _process_function(chaining, routine):
      
  
      def processing(*args, **kwargs):
          """Execute routine with input args and kwargs and add reuslt in
          chaining.___.
  
          :param tuple args: routine varargs.
          :param dict kwargs: routine kwargs.
          :return: chaining chaining.
          :rtype: Chaining
          """
  
          result = routine(*args, **kwargs)
          chaining.___.append(result)
  
          return chaining
  
      return processing
docs: Chain function which returns a function.
  
      :param routine: routine to process.
      :return: routine embedding execution function.