How to use the @vue/runtime-core.setTransitionHooks function in @vue/runtime-core

return () => {
      const rawProps = toRaw(props)
      const cssTransitionProps = resolveTransitionProps(rawProps)
      const tag = rawProps.tag || Fragment
      prevChildren = children
      children = slots.default ? slots.default() : []

      // handle fragment children case, e.g. v-for
      if (children.length === 1 && children[0].type === Fragment) {
        children = children[0].children as VNode[]
      }

      for (let i = 0; i < children.length; i++) {
        const child = children[i]
        if (child.key != null) {
          setTransitionHooks(
            child,
            resolveTransitionHooks(child, cssTransitionProps, state, instance)
          )
        } else if (__DEV__) {
          warn(` children must be keyed.`)
        }
      }

      if (prevChildren) {
        for (let i = 0; i < prevChildren.length; i++) {
          const child = prevChildren[i]
          setTransitionHooks(
            child,
            resolveTransitionHooks(child, cssTransitionProps, state, instance)
          )
          positionMap.set(child, child.el.getBoundingClientRect())