<template lwc:render-mode="light">
    <div>&lt;x-main&gt;</div>
    <x-scoped instance="1">
        <template lwc:slot-data="item1">
            <x-scoped instance="2">
                <template lwc:slot-data="item2">
                    <span>main: {item1.msg} {item2.msg}</span>
                    <x-child></x-child>
                </template>
            </x-scoped>
        </template>
    </x-scoped>
    <div>&lt;/x-main&gt;</div>
</template>
