docs: def _ParseEntry(self, key, val):
      """Adds an entry for a configuration setting.
  
      Args:
        key: The name of the setting.
        val: The value of the setting.
      """
      if key in self._repeated:
        setting = self.section.setdefault(key, [])
        setting.extend(val)
      else:
        self.section.setdefault(key, val)