How to use the nativescript-bluetooth.Bluetooth function in nativescript-bluetooth

import { Injectable, NgZone } from '@angular/core';
import { Observable, Subscription, fromEventPattern } from 'rxjs';
import { takeWhile } from 'rxjs/operators';
import * as dialogs from '@nativescript/core/ui/dialogs';
import { Bluetooth, Peripheral, Service, Characteristic, ReadResult } from 'nativescript-bluetooth';

const bluetooth = new Bluetooth();
bluetooth.debug = true;

export interface IPeripheral extends Peripheral {
    isConnected?: boolean;
}
export interface IService extends Service {
    peripheralRef?: IPeripheral; // retain a reference to the parent peripheral
}
export interface ICharacteristic extends Characteristic {
    serviceRef?: IService; // retain a reference to the parent service
    isExpandedView?: boolean; // toggle for view component to show/hide the read/write/notify properties
    isNotifying?: boolean;
    readResult?: CharOpResult;
    writeResult?: CharOpResult;
    writeWithoutResponseResult?: CharOpResult;
    notifyResult?: CharOpResult;