How to use the @polkadot/ui-settings.camera function in @polkadot/ui-settings

export default function Settings (): React.ReactElement<{}> {
  const [camera, setCamera] = useState(settings.camera);
  const [prefix, setPrefix] = useState(`${settings.prefix}`);

  const _onChangeCamera = (camera: string): void => {
    setCamera(camera);

    settings.set({ camera });
  };

  // FIXME check against index, we need a better solution
  const _onChangePrefix = (value: string): void => {
    const prefix = parseInt(value, 10);

    setSS58Format(prefix === -1 ? 42 : prefix);
    setPrefix(value);

    settings.set({ prefix });