/**
  * constructor function creating array collection object
  * @return void
  */
 public function __construct()
 {
     $this->attachment = new ArrayCollection();
     $this->cc = new ArrayCollection();
     $this->bcc = new ArrayCollection();
     parent::__construct();
 }
 /**
  * set up the document
  * @return void
  */
 public function __construct()
 {
     $this->recipient = new ArrayCollection();
     parent::__construct();
 }