mountFiberRecursively(
          nextPrimaryChildSet,
          shouldIncludeInTree ? nextFiber : parentFiber,
          true,
          traceNearestHostComponentUpdate,
        );
      }
      shouldResetChildren = true;
    } else if (!prevDidTimeout && nextDidTimeOut) {
       Pri
       1. 
       Thi
       We 
      unmountFiberChildrenRecursively(prevFiber);
       2. 
      const nextFiberChild = nextFiber.child;
      const nextFallbackChildSet = nextFiberChild
        ? nextFiberChild.sibling
        : null;
      if (nextFallbackChildSet != null) {
        mountFiberRecursively(
          nextFallbackChildSet,
          shouldIncludeInTree ? nextFiber : parentFiber,
          true,
          traceNearestHostComponentUpdate,
        );
        shouldResetChildren = true;
      }
    } else {
       Com