如何在mixins中使用Vuejs3/setup方法？

// myMixin.js
import { ref } from 'vue';

export function useMyMixin() {
const myData = ref('Hello from mixin');

function myMethod() {
console.log(myData.value);
}

return {
myData,
myMethod
};
}

// MyComponent.vue
<template>
<div>{{ myData }}</div>
<button @click="myMethod">Click me</button>
</template>

<script>
import { setup } from 'vue';
import { useMyMixin } from './myMixin';

export default {
setup() {
const { myData, myMethod } = useMyMixin();
return {
myData,
myMethod
};
}
};
</script>

// myMixin.js
export default {
install(app, options) {
app.mixin({
created() {
if (this.$options.setup) {
const setupResult = this.$options.setup.call(this);
Object.assign(this, setupResult);
}
}
});
}
};

// MyComponent.vue
<template>
<div>{{ myData }}</div>
</template>

<script>
import { ref } from 'vue';
import myMixin from './myMixin';

export default {
mixins: [myMixin],
setup() {
const myData = ref('Hello from setup');
return {
myData
};
}
};
</script>