docs: def bridge_exists(br):
      '''
      Tests whether bridge exists as a real or fake  bridge.
  
      Returns:
          True if Bridge exists, else False.
  
      .. versionadded:: 2016.3.0
  
      CLI Example:
      .. code-block:: bash
  
          salt '*' openvswitch.bridge_exists br0
      '''
      cmd = 'ovs-vsctl br-exists {0}'.format(br)
      result = __salt__['cmd.run_all'](cmd)
      retcode = result['retcode']
      return _retcode_to_bool(retcode)