Args:
            name (str | unicode): Name of slot to set.
            value: Associated value

def _set(self, name, value):
        """
        Args:
            name (str | unicode): Name of slot to set.
            value: Associated value
        """
        if value is not UNSET:
            if isinstance(value, Slotted):
                current = getattr(self, name, UNSET)
                if current is None or current is UNSET:
                    current = value.__class__()
                    current.set(value)
                    setattr(self, name, current)
                    return
                if isinstance(current, Slotted):
                    current.set(value)
                    return
            setattr(self, name, value)