code: func (client *cniClient) constructNetworkConfig(cfg interface{}, plugin string) (*libcni.NetworkConfig, error) {
  	configBytes, err := json.Marshal(cfg)
  	if err != nil {
  		seelog.Errorf("[ECSCNI] Marshal configuration for plugin %s failed, error: %v", plugin, err)
  		return nil, err
  	}
  	networkConfig := &libcni.NetworkConfig{
  		Network: &cnitypes.NetConf{
  			Type: plugin,
  		},
  		Bytes: configBytes,
  	}
  
  	return networkConfig, nil
  }
docs: // constructNetworkConfig takes in the config from agent and construct the configuration
  // that's accepted by the libcni