docs: def setter(self, can_set=None):
          """
          Like `CachedProp.deleter` is for `CachedProp.can_delete`, but for `can_set`
  
          :param can_set: boolean to change to it, and None to toggle
          :type can_set: Optional[bool]
          :return: self, so this can be used as a decorator like a `property`
          :rtype: CachedProperty
          """
          if can_set is None:
              self._setter = not self._setter
          else:
              self._setter = bool(can_set)
          # For use as decorator
          return self