React-native MessageQueue.spy use

index.js

import React from 'react';
import {AppRegistry} from 'react-native';
import MainScreen from './screens/main';
import relayContainer from 'shared/relay-container';
import MessageQueue from 'react-native/Libraries/BatchedBridge/MessageQueue';

AppRegistry.registerComponent('MainScreen', () => relayContainer(MainScreen));

// Disable warning box on development mode
console.disableYellowBox = true;

// Spy debugging
if (__DEV__) {
  const logSpy = (info) => {
    const fromTo = info.type === 0 ? 'TO JS: ' : 'TO ANDROID: ';
    const methodSignature = info.module + '.' + info.method + '(' + JSON.stringify(info.args) + ')';
    console.log('spy: ', fromTo + methodSignature);
  };
  MessageQueue.spy(logSpy);
}

export default class App extends React.Component {}