next.js/test/development/basic/barrel-optimization/fixture/app/mui/page.js

import { Button } from '@mui/material'
import { Typography } from '@mui/material'

export default function Page() {
  return (
    <div>
      <Button id="button">button</Button>
      <Typography id="typography" variant="h1">
        typography
      </Typography>
    </div>
  )
}