docs: def _set_cache_value(self, key, value, type):
          """Used internally by the accessor properties."""
          if type is bool:
              if value:
                  self[key] = None
              else:
                  self.pop(key, None)
          else:
              if value is None:
                  self.pop(key)
              elif value is True:
                  self[key] = None
              else:
                  self[key] = value