def METHOD_NAME(self) -> None:
    """Remove the current value, the default will be used until it is set again."""
    if not self._mutable:
        msg = f"{self} cannot be modified after initial load"
        raise TypeError(msg)
    old = self.current
    delattr(self, "_current")
    if self.current != old:
        for sub_func in self._subscribers:
            sub_func(self.current)