If you have `memo(forwardRef(X))`, then the inner component won't have a "rendered by" list. This is because it technically doesn't have an owner. It is artificial.

I think we should ideally set up `_debugOwner` for these Fibers in DEV just so existing tooling can find them. Or special case them in DevTools.
throw new Error('Expected to find the previous sibling.');
        }
      }
      prevSibling.sibling = newWorkInProgress;
    }
    
    
    const last = returnFiber.lastEffect;
    if (last !== null) {
      last.nextEffect = current;
      returnFiber.lastEffect = current;
    } else {
      returnFiber.firstEffect = returnFiber.lastEffect = current;
    }
    const deletions = returnFiber.deletions;
    if (deletions === null) {
      returnFiber.deletions = [current];
      
      returnFiber.effectTag |= Deletion;
    } else {
      deletions.push(current);
    }
    current.nextEffect = null;
    newWorkInProgress.effectTag |= Placement;
     Restart work from the new fiber.
    return newWorkInProgress;
  } else {
    throw new Error(
      'Did not expect this call in production. ' +
        'This is a bug in React. Please file an issue.',