code: def _get_setting(self, key, default_value=None, value_type=str):
          
          try:
              state_entry = self._state_view.get(
                  SettingsView.setting_address(key))
          except KeyError:
              return default_value
  
          if state_entry is not None:
              setting = Setting()
              setting.ParseFromString(state_entry)
              for setting_entry in setting.entries:
                  if setting_entry.key == key:
                      return value_type(setting_entry.value)
  
          return default_value
docs: Get the setting stored at the given key.
  
          Args:
              key (str): the setting key
              default_value (str, optional): The default value, if none is
                  found. Defaults to None.
              value_type (function, optional): The type of a setting value.
                  Defaults to `str`.
  
          Returns:
              str: The value of the setting if found, default_value
              otherwise.