How to use the @ionic-native/google-maps.Environment.setEnv function in @ionic-native/google-maps

loadMap() {

    // This code is necessary for browser
    Environment.setEnv({
      'API_KEY_FOR_BROWSER_RELEASE': 'API-KEY',
      'API_KEY_FOR_BROWSER_DEBUG': 'API-KEY'
    });

    let mapOptions: GoogleMapOptions = {
      camera: {
         target: {
          lat: 13.0380523,
          lng: 80.21371
         },
         zoom: 18,
         tilt: 30
       }
    };

    this.map = GoogleMaps.create('map', mapOptions);