code: func retrievePersistedChannelConfig(ledger ledger.PeerLedger) (*common.Config, error) {
  	qe, err := ledger.NewQueryExecutor()
  	if err != nil {
  		return nil, err
  	}
  	defer qe.Done()
  	return retrievePersistedConf(qe, channelConfigKey)
  }
docs: // retrievePersistedChannelConfig retrieves the persisted channel config from statedb