code: def list_upgrades(refresh=True, backtrack=3, **kwargs):  # pylint: disable=W0613
      '''
      List all available package upgrades.
  
      refresh
          Whether or not to sync the portage tree before checking for upgrades.
  
      backtrack
          Specifies an integer number of times to backtrack if dependency
          calculation fails due to a conflict or an unsatisfied dependency
          (default: ´3´).
  
          .. versionadded: 2015.8.0
  
      CLI Example:
  
      .. code-block:: bash
  
          salt '*' pkg.list_upgrades
      '''
      if salt.utils.data.is_true(refresh):
          refresh_db()
      return _get_upgradable(backtrackf list_upgrades(refresh=True, backtrack=3, **kwargs):  # pylint: disable=W0613
      '''
      List all available package upgrades.
  
      refresh
          Whether or not to sync the portage tree before checking for upgrades.
  
      backtrack
          Specifies an integer number of times to backtrack if dependency
          calculation fails due to a conflict or an unsatisfied dependency
          (default: ´3´).
  
          .. versionadded: 2015.8.0
  
      CLI Example:
  
      .. code-block:: bash
  
          salt '*' pkg.list_upgrades
      '''
      if salt.utils.data.is_true(refresh):
          refresh_db()
      return _get_upgradable(backtrack)
docs: List all available package upgrades.
  
      refresh
          Whether or not to sync the portage tree before checking for upgrades.
  
      backtrack
          Specifies an integer number of times to backtrack if dependency
          calculation fails due to a conflict or an unsatisfied dependency
          (default: ´3´).
  
          .. versionadded: 2015.8.0
  
      CLI Example:
  
      .. code-block:: bash
  
          salt '*' pkg.list_upgrades