code: def module_return(self, return_code, timeperiods):
          
          # Only if in modulation_period of modulation_period == None
          if self.is_active(timeperiods):
              # Try to change the exit code only if a new one is defined
              if self.exit_code_modulation is not None:
                  # First with the exit_code_match
                  if return_code in self.exit_codes_match:
                      return_code = self.exit_code_modulation
  
          return return_code
docs: Module the exit code if necessary ::
  
          * modulation_period is legit
          * exit_code_modulation
          * return_code in exit_codes_match
  
          :param return_code: actual code returned by the check
          :type return_code: int
          :return: return_code modulated if necessary (exit_code_modulation)
          :rtype: int