Call a JavaScript in other aspects using React Native

'use strict';

var React = require('react-native');
var {
 AppRegistry
} = React;< br />

AppRegistry.registerComponent('GiftedMessengerExample', () => require('./Navigation'));

var MessageBox = require('./ Navigation');

var MyCode = React.createClass({

 _openGiftedMessanger(){
 return ();
 }, 

 render: function() {
 
  style={styles.imButton}
 onPress ={this._openGiftedMessanger}>
 Open Chat Room
 
 
 }
});

_openGiftedMessanger()(
 return ();
 },

this.props.navigator.push({
 title:'Gifted messenger',
 component: MessageBox
));

I want to call a module from one javascript to another module. Currently I have downloaded the demo version of GiftedMessanger

I created my own react native (ios) code, I added all the dependencies of GiftedMessanger in the code, and successfully downloaded all the node modules.
Now included in the GiftedMessanger demo code index.ios.js,< /p>

'use strict';

var React = require('react-native');
var {
 AppRegistry< br />) = React;


AppRegistry.registerComponent('GiftedMessengerExample', () => require('./Navigation'));

and all The code runs normally.
I do the same thing in my code. I want to use GiftedMessanger as a separate page, click the button and click the code written like this,

 var MessageBox = req uire('./Navigation');

var MyCode = React.createClass({

 _openGiftedMessanger(){
 return ();< br /> },

 render: function() {
 
  style={styles.imButton} 
 onPress={this._openGiftedMessanger}>
 Open Chat Room
 
 
 }
));

The above now opens the Gifted messanger view. And no error is thrown on the console. Where is my error, call the javascript code.

The problem lies in this code:

_openGiftedMessanger(){
 return ();
 },

To replace the current view with a new view, please use the Navigator or NavigatorIOS component. The new code should look like this:

this.props. navigator.push({
 title:'Gifted messenger',
 component: MessageBox
});