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

it('should merge lifecycle hooks', async () => {
    const calls: string[] = []
    const state = observable({ ok: true })

    class Base extends Component {
      beforeCreate() {
        calls.push('base beforeCreate')
      }
      created() {
        calls.push('base created')
      }
      beforeMount() {
        calls.push('base beforeMount')
      }
      mounted() {
        calls.push('base mounted')
      }
      beforeUpdate() {
        calls.push('base beforeUpdate')