docs: def list_provides(root=None, **kwargs):
      '''
      .. versionadded:: 2018.3.0
  
      List package provides of installed packages as a dict.
      {'<provided_name>': ['<package_name>', '<package_name>', ...]}
  
      root
          operate on a different root directory.
  
      CLI Examples:
  
      .. code-block:: bash
  
          salt '*' pkg.list_provides
      '''
      ret = __context__.get('pkg.list_provides')
      if not ret:
          cmd = ['rpm']
          if root:
              cmd.extend(['--root', root])
          cmd.extend(['-qa', '--queryformat', '%{PROVIDES}_|-%{NAME}\n'])
          ret = dict()
          for line in __salt__['cmd.run'](cmd, output_loglevel='trace', python_shell=False).splitlines():
              provide, realname = line.split('_|-')
  
              if provide == realname:
                  continue
              if provide not in ret:
                  ret[provide] = list()
              ret[provide].append(realname)
  
          __context__['pkg.list_provides'] = ret
  
      return ret