Common/Model/Notify.php
public function addExtraRecipient(Recipient $recipient)
    {
        if (!$this->extraRecipients->contains($recipient)) {
            $this->extraRecipients->add($recipient);
        }

        return $this;
    }
public function addExtraRecipient(Recipient $recipient)
    {
        if (!$this->extraRecipients->contains($recipient)) {
            $this->extraRecipients->add($recipient);
        }

        return $this;
    }
Adds the extra recipient.

@param Recipient $recipient

@return Notify