next.js/crates/next-custom-transforms/tests/fixture/next-font-loaders/font-options/input.js

import React from 'react'
import { Fira_Code } from '@next/font/google'

const firaCode = Fira_Code({
  variant: '400',
  fallback: ['system-ui', { key: false }, []],
  preload: true,
  key: { key2: {} },
})

console.log(firaCode)