docs: def version_cmp(ver1, ver2, ignore_epoch=False, **kwargs):
      '''
      .. versionadded:: 2015.5.4
  
      Do a cmp-style comparison on two packages. Return -1 if ver1 < ver2, 0 if
      ver1 == ver2, and 1 if ver1 > ver2. Return None if there was a problem
      making the comparison.
  
      ignore_epoch : False
          Set to ``True`` to ignore the epoch when comparing versions
  
          .. versionadded:: 2015.8.10,2016.3.2
  
      CLI Example:
  
      .. code-block:: bash
  
          salt '*' pkg.version_cmp '0.2-001' '0.2.0.1-002'
      '''
      return __salt__['lowpkg.version_cmp'](ver1, ver2, ignore_epoch=ignore_epoch)