Model/Email/SenderBuilder.php
public function send()
    {
        $vars = $this->templateContainer->getTemplateVars();
        $this->checkInvoice($vars);

        parent::send();
    }
public function send()
    {
        $vars = $this->templateContainer->getTemplateVars();
        $this->checkInvoice($vars);

        parent::send();
    }
public function send ( ) { $ vars = $ this -> templateContainer -> getTemplateVars ( ) ; $ this -> checkInvoice ( $ vars ) ; parent :: send ( ) ; }
Add attachment to the main mail
Add attachment to the main mail