step-three_NativeVisionApp.tsx

import React, {FC} from 'react';
import {Button, NativeModules, SafeAreaView} from 'react-native';
const {VisionModule} = NativeModules;

const App: FC = () => {
  const callback = (firstArg: any, secondArg: any) => {
    console.log('callback args: ', firstArg, secondArg);
  };
  return (
    <SafeAreaView>
      <Button
        title="Say Hello"
        onPress={() =>
          VisionModule?.sayHello('this message is special', 1764, callback)
        }
      />
    </SafeAreaView>
  );
};

export default App;