code: @Override
      public void merge(ProtoNetwork protoNetworkDestination,
              ProtoNetwork protoNetworkSource) {
  
          if (protoNetworkSource == null) {
              return;
          }
  
          ProtoNetworkMerger protoNetworkMerger = new ProtoNetworkMerger();
          protoNetworkMerger.merge(protoNetworkDestination, protoNetworkSource);
      }
docs: {@inheritDoc}