docs: def upgrade(**kwargs):
      '''
      Upgrade all software. Currently not implemented
  
      Kwargs:
          saltenv (str): The salt environment to use. Default ``base``.
          refresh (bool): Refresh package metadata. Default ``True``.
  
      .. note::
          This feature is not yet implemented for Windows.
  
      Returns:
          dict: Empty dict, until implemented
  
      CLI Example:
  
      .. code-block:: bash
  
          salt '*' pkg.upgrade
      '''
      log.warning('pkg.upgrade not implemented on Windows yet')
      refresh = salt.utils.data.is_true(kwargs.get('refresh', True))
      saltenv = kwargs.get('saltenv', 'base')
      log.warning('pkg.upgrade not implemented on Windows yet refresh:%s saltenv:%s', refresh, saltenv)
      # Uncomment the below once pkg.upgrade has been implemented
  
      # if salt.utils.data.is_true(refresh):
      #    refresh_db()
      return {}