This DEV-only field was added in 836331ba5f69f2cc53b273ec073fae116db14302 by @sebmarkbage but it's not being used anymore to my knowledge.
baseLanes: NoLanes,
        cachePool: null,
      };
      workInProgress.memoizedState = nextState;
      pushRenderLanes(workInProgress, renderLanes);
    } else if (!includesSomeLane(renderLanes, (OffscreenLane: Lane))) {
      
      
      let nextBaseLanes;
      if (prevState !== null) {
        const prevBaseLanes = prevState.baseLanes;
        nextBaseLanes = mergeLanes(prevBaseLanes, renderLanes);
        if (enableCache) {
          
          spawnedCachePool = getOffscreenDeferredCachePool();
          
          
          
        }
      } else {
        nextBaseLanes = renderLanes;
      }
      
      workInProgress.lanes = workInProgress.childLanes = laneToLanes(
        OffscreenLane,
      );
      const nextState: OffscreenState = {
        baseLanes: nextBaseLanes,
        cachePool: spawnedCachePool,
      };