/**
 * @param {!angularFire.$firebaseObject} $firebaseObject
 * @param {!angularFire.$firebaseArray} $firebaseArray
 * @param {!angularFire.$firebaseAuth} $firebaseAuth
 * @ngInject
 */
function foo ($firebaseObject, $firebaseArray, $firebaseAuth) {

    var ref = new Firebase('https://<name>.firebaseio.com/');

    /**
     * @type {!angularFire.FirebaseObject}
     */
    var obj = $firebaseObject(ref);

    /**
     * @type {!angularFire.FirebaseArray}
     */
    var arr = $firebaseArray(ref);

    /**
     * @type {!angularFire.FirebaseAuth}
     */
    var auth = $firebaseAuth(ref);
}