code: def _validate_paths(self, settings, name, value):
          
          return [self._validate_path(settings, name, item)
                  for item in value]
docs: Apply ``SettingsPostProcessor._validate_path`` to each element in
          list.
  
          Args:
              settings (dict): Current settings.
              name (str): Setting name.
              value (list): List of paths to patch.
  
          Raises:
              boussole.exceptions.SettingsInvalidError: Once a path does not
                  exists.
  
          Returns:
              list: Validated paths.