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FirebaseRef must be an instance of Firebase at new Geofire

import AngularFireDatabase from 
'angularfire2/database';

import * as GeoFire from "geofire";

import * as Firebase from "firebase";

 constructor(public http: HttpClient, public afs: AngularFireDatabase,
 public pickuprequest: PickuprequestProvider
 ) 
 this.dbLocationRef = this.afs.list('driversAvailable/' + this.driverId);
 this.geoFire = new GeoFire(this.dbLocationRef.$ref);
 

 updateDriverLocation(key, latitude, longitude)
 
 this.geoFire.set(key, [latitude, longitude])
 .then(_ => console.log('location updated'))
 .catch(err => console.log(err))
 

 this.dbLocationRef = new Firebase(this.afs.list('driversAvailable/' + this.driverId));

cannot use new with expression whose type lacks call or construct signature. 

FirebaseRef must be an instance of Firebase at new Geofire

import AngularFireDatabase from 
'angularfire2/database';

import * as GeoFire from "geofire";

import * as Firebase from "firebase";

 constructor(public http: HttpClient, public afs: AngularFireDatabase,
 public pickuprequest: PickuprequestProvider
 ) 
 this.dbLocationRef = this.afs.list('driversAvailable/' + this.driverId);
 this.geoFire = new GeoFire(this.dbLocationRef.$ref);
 

 updateDriverLocation(key, latitude, longitude)
 
 this.geoFire.set(key, [latitude, longitude])
 .then(_ => console.log('location updated'))
 .catch(err => console.log(err))
 

 this.dbLocationRef = new Firebase(this.afs.list('driversAvailable/' + this.driverId));

cannot use new with expression whose type lacks call or construct signature. 

FirebaseRef must be an instance of Firebase at new Geofire

import AngularFireDatabase from 
'angularfire2/database';

import * as GeoFire from "geofire";

import * as Firebase from "firebase";

 constructor(public http: HttpClient, public afs: AngularFireDatabase,
 public pickuprequest: PickuprequestProvider
 ) 
 this.dbLocationRef = this.afs.list('driversAvailable/' + this.driverId);
 this.geoFire = new GeoFire(this.dbLocationRef.$ref);
 

 updateDriverLocation(key, latitude, longitude)
 
 this.geoFire.set(key, [latitude, longitude])
 .then(_ => console.log('location updated'))
 .catch(err => console.log(err))
 

 this.dbLocationRef = new Firebase(this.afs.list('driversAvailable/' + this.driverId));

cannot use new with expression whose type lacks call or construct signature. 

FirebaseRef must be an instance of Firebase at new Geofire

import AngularFireDatabase from 
'angularfire2/database';

import * as GeoFire from "geofire";

import * as Firebase from "firebase";

 constructor(public http: HttpClient, public afs: AngularFireDatabase,
 public pickuprequest: PickuprequestProvider
 ) 
 this.dbLocationRef = this.afs.list('driversAvailable/' + this.driverId);
 this.geoFire = new GeoFire(this.dbLocationRef.$ref);
 

 updateDriverLocation(key, latitude, longitude)
 
 this.geoFire.set(key, [latitude, longitude])
 .then(_ => console.log('location updated'))
 .catch(err => console.log(err))
 

 this.dbLocationRef = new Firebase(this.afs.list('driversAvailable/' + this.driverId));

cannot use new with expression whose type lacks call or construct signature. 

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