Send an invoice to Xero in Laravel Job

SendXeroInvoice.php

<?php
namespace App\Jobs\Xero;

use File;
use DateTime;
use App\Models\Invoice;
use Illuminate\Bus\Queueable;
use Spatie\Browsershot\Browsershot;
use Illuminate\Queue\SerializesModels;
use Illuminate\Queue\InteractsWithQueue;
use Illuminate\Contracts\Queue\ShouldQueue;
use Illuminate\Foundation\Bus\Dispatchable;
use XeroPHP\Application\PrivateApplication;
use App\Repositories\Backend\InvoiceRepository;
use App\Repositories\Backend\LineItemRepository;
use XeroPHP\Models\Accounting\Account as XeroAccount;
use XeroPHP\Models\Accounting\Contact as XeroContact;
use XeroPHP\Models\Accounting\Invoice as XeroInvoice;
use XeroPHP\Models\Accounting\Payment as XeroPayment;
use XeroPHP\Models\Accounting\Attachment as XeroAttachment;
use XeroPHP\Models\Accounting\Invoice\LineItem as XeroLineItem;

class SendXeroInvoice implements ShouldQueue
{
    use Dispatchable, InteractsWithQueue, Queueable, SerializesModels;
    protected $invoice;
    protected $xero;
    protected $invoiceRepository;
    /**
     * Create a new job instance.
     *
     * @return void
     */
    public function __construct(Invoice $invoice)
    {
        //
        $this->xero = new PrivateApplication(config('xero'));
        
        $this->invoiceRepository = new InvoiceRepository(new LineItemRepository);
        
        $this->invoice = $invoice;
    }
    /**
     * Execute the job.
     *
     * @return void
     */
    public function handle()
    {
        //
        $xeroInvoice = new XeroInvoice($this->xero);
        $xeroInvoice->setContact($this->xero->loadByGUID(XeroContact::class, $this->invoice->company->xeroContact->xero_id))
                    ->setReference($this->invoice->name)
                    ->setType($this->invoice->type)
                    ->setCurrencyCode('AUD')
                    ->setDueDate(new DateTime($this->invoice->due_date))
                    ->setStatus($this->invoice->status);        
        
        foreach($this->invoice->lineItems as $item) {
            $xeroLineItem = new XeroLineItem($this->xero);
            $xeroLineItem->setDescription($item->description)
                         ->setQuantity($item->quantity)
                         ->setUnitAmount($item->dollar_unit_price)
                         ->setItemCode($item->xeroItem->code)
                         ->setAccountCode($item->xeroAccount->code);
                         
            $xeroInvoice->addLineItem($xeroLineItem);
        }
        if ($xeroInvoice->save()) {
            //Create the invoice PDF and save
            $name = 'invoice-'.$this->invoice->id.'.pdf';
            $invoice = $this->invoice;
            $view = view('backend.invoice.pdf', compact('invoice'));
            
            Browsershot::html($view)->margins(20, 0, 20, 0)->showBackground()->waitUntilNetworkIdle()->save(storage_path('app/'.($name)));
            
            $xeroAttachment = XeroAttachment::createFromLocalFile(storage_path('app/'.$name));
            $xeroInvoice->addAttachment($xeroAttachment);
            $xeroInvoice->save();
            
            File::delete(storage_path('app/'.$name));
            
            // Successfully saved to Xero with attachment
            $this->invoiceRepository->update($this->invoice, [
                'xero_id' => $xeroInvoice->getInvoiceNumber(),
                'xero_guid' => $xeroInvoice->getGuid()
            ]);
        }
    }

For the namespace of Xero (use XeroPHP\Models\Accounting), Which package you used ?

https://github.com/calcinai/xero-php