because we don't want to highlight every host node inside of a newly mounted subtree.
    }
    const isSuspense = fiber.tag === ReactTypeOfWork.SuspenseComponent;
    if (isSuspense) {
      const isTimedOut = fiber.memoizedState !== null;
      if (isTimedOut) {
         Spe
         get 
         it 
        const primaryChildFragment = fiber.child;
        const fallbackChildFragment = primaryChildFragment
          ? primaryChildFragment.sibling
          : null;
        const fallbackChild = fallbackChildFragment
          ? fallbackChildFragment.child
          : null;
        if (fallbackChild !== null) {
          mountFiberRecursively(
            fallbackChild,
            shouldIncludeInTree ? fiber : parentFiber,
            true,
            traceNearestHostComponentUpdate,
          );
        }
      } else {
        let primaryChild: Fiber | null = null;
        const areSuspenseChildrenConditionallyWrapped =
          OffscreenComponent === -1;
        if (areSuspenseChildrenConditionallyWrapped) {
          primaryChild = fiber.child;