This DEV-only field was added in 836331ba5f69f2cc53b273ec073fae116db14302 by @sebmarkbage but it's not being used anymore to my knowledge.
reenterHydrationStateFromDehydratedSuspenseInstance(
      workInProgress,
      suspenseInstance,
    );
    const nextProps = workInProgress.pendingProps;
    const primaryChildren = nextProps.children;
    const primaryChildFragment = mountSuspensePrimaryChildren(
      workInProgress,
      primaryChildren,
      renderLanes,
    );
    
    
    
    
    
    
    primaryChildFragment.flags |= Hydrating;
    return primaryChildFragment;
  }
}
function scheduleWorkOnFiber(fiber: Fiber, renderLanes: Lanes) {
  fiber.lanes = mergeLanes(fiber.lanes, renderLanes);
  const alternate = fiber.alternate;
  if (alternate !== null) {
    alternate.lanes = mergeLanes(alternate.lanes, renderLanes);
  }
  scheduleWorkOnParentPath(fiber.return, renderLanes);
}
function propagateSuspenseContextChange(