code: def call_eval(self, value, caller, return_value=True, **kwargs):
          
          value = self.name_to_system_object(value)
          if return_value and isinstance(value, AbstractStatusObject):
              return value.status
          if hasattr(value, 'call'):
              return self.call_eval(value.call(caller, **kwargs), caller, return_value, **kwargs)
          else:
              return value
docs: Value might be either name registered in System namespace, or object, either
              StatusObject or Callable. If Callable, evaluate :meth:`.call` method. If StatusObject,
              return status.