I want to add extra variables onto my return function. How can I do this?

<?php

    namespace App\Http\Controllers;

    use App\Http\Requests;
    use Illuminate\Http\Request;
    use Auth;
    use App\User;
    use App\Address;
    use Illuminate\Support\Facades\Hash;

    class ProfileController extends Controller
    {
             public function returnView()
    {
    return view('profile')->with('csspath',$this->css)->with('jspath',$this->js)->with('firstname',$this->first_name)->with('lastname',$this->last_name)->with('phone',$this->phone)->with('landline',$this->landline)->with('address',$this->address)->with('page_name','profile')->with('addressbook',$this->addressbook);
     }
     protected function newAddressBook(Request $request)
     {
         $extra_data = "I want this added onto the returnview function";
         return $this->returnView(); // How do I add more? return $this->returnView()->with('extradata',$extra_data); does not work
      }

}