如何在react-fontawesome中使用图层

npm install @fortawesome/react-fontawesome

import { FontAwesomeIcon } from '@fortawesome/react-fontawesome'
import { faUser, faLayerGroup } from '@fortawesome/free-solid-svg-icons'

render() {
  return (
    <div>
      <FontAwesomeIcon icon={faUser} />
      <FontAwesomeIcon icon={faLayerGroup} mask={faUser} />
    </div>
  )
}

<FontAwesomeIcon icon={faLayerGroup} mask={faUser} className="layer" />

<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/5.15.4/css/all.min.css" />