This DEV-only field was added in 836331ba5f69f2cc53b273ec073fae116db14302 by @sebmarkbage but it's not being used anymore to my knowledge.
tailMode,
        );
        break;
      }
      case 'together': {
        initSuspenseListRenderState(
          workInProgress,
          false, 
          null, 
          null, 
          undefined,
        );
        break;
      }
      default: {
        
        
        workInProgress.memoizedState = null;
      }
    }
  }
  return workInProgress.child;
}
function updatePortalComponent(
  current: Fiber | null,
  workInProgress: Fiber,
  renderLanes: Lanes,
) {
  pushHostContainer(workInProgress, workInProgress.stateNode.containerInfo);
  const nextChildren = workInProgress.pendingProps;