Occurs in Fiber with multiple instances of the React package (which can't share current owner).
}
      } else {
        switch (newChild.$$typeof) {
          case REACT_ELEMENT_TYPE:
            return placeSingleChild(
              reconcileSingleElement(
                returnFiber,
                currentFirstChild,
                newChild,
                priority,
              ),
            );
          case REACT_COROUTINE_TYPE:
            return placeSingleChild(
              reconcileSingleCoroutine(
                returnFiber,
                currentFirstChild,
                newChild,
                priority,
              ),
            );
          case REACT_YIELD_TYPE:
            return placeSingleChild(
              reconcileSingleYield(
                returnFiber,
                currentFirstChild,
                newChild,
                priority,
              ),
            );