Debemos crear una aplicación en Expo, y agregar el siguiente código.
import { usePathname } from 'expo-router'import { Text } from 'react-native' import { useFetchScreen, S42ScreenBuilder, ErrorScreen, LoadingScreen,} from '@/s42ui-react-native' type TypeContacts = [{ firstName: string; lastName: string }] const customFunctionMapper = { searchContacts: (contacts: TypeContacts) => { return contacts.filter(contact => contact.firstName === 'best') },} export default function NotFoundScreen() { const pathname = usePathname() const [loading, screen, error] = useFetchScreen(pathname) if (loading) { return <LoadingScreen /> } if (error) { return <ErrorScreen /> } if (!loading && !screen) { return <Text>Not Found</Text> } return ( <> <S42ScreenBuilder screen={screen} customFunctionMapper={customFunctionMapper} /> </> )}