Ionic 2: how can I use functions such as startStateNotifications() using ionic-native's BLE plugin?

Question

I'm currently using the cordova-plugin-ble-central plugin in an Ionic 1 app. I'm converting this app to Ionic 2, so I want to use this plugin through ionic-native.

The issue is that some of the plugin's functions are not available through ionic-native. For example, the function ble.startStateNotifications(success, failure); is not available with ionic-native, whereas ble.isEnabled(success, failure); is (both are available in cordova-plugin-ble-central).

Do I have to use the plugin without ionic-native to be able to use all of it's methods?

==================

EDIT

Finally I used the plugin directly (outside ionic-native) and converted the callback functions to Observables like this :

import { Injectable } from '@angular/core';
import { Observable } from 'rxjs/Observable';

declare var ble;

@Injectable()
export class BLEService {
    constructor() {}

    BLEstartStateNotifications() {
        return new Observable((observer) => {
            ble.startStateNotifications((state) => {
                observer.next(state);
            }, (err) => {
                observer.error(err);
            });
        });
    }
}

And then you can call the function as an Observable:

this.BLEstartStateNotifications().subscribe((state) => {
    console.log(state);
}, (error) => {
    console.log(error);
});