fiber: Fiber,
    nextChildren: Array<number>,
  ) {
    if (!shouldFilterFiber(fiber)) {
      nextChildren.push(getFiberID(getPrimaryFiber(fiber)));
    } else {
      let child = fiber.child;
      const isTimedOutSuspense =
        fiber.tag === SuspenseComponent && fiber.memoizedState !== null;
      if (isTimedOutSuspense) {
         Spe
         get 
         and 
        const primaryChildFragment = fiber.child;
        const fallbackChildFragment = primaryChildFragment
          ? primaryChildFragment.sibling
          : null;
        const fallbackChild = fallbackChildFragment
          ? fallbackChildFragment.child
          : null;
        if (fallbackChild !== null) {
          child = fallbackChild;
        }
      }
      while (child !== null) {
        findReorderedChildrenRecursively(child, nextChildren);
        child = child.sibling;
      }
    }