PayPal\Api\Payee::setEmail PHP Method

    public function setEmail($email)
    {
        $this->email = $email;
        return $this;
    }

 public static function createPayee()
 {
     $payee = new Payee();
     $payee->setEmail(self::$email);
     $payee->setMerchantId(self::$merchant_id);
     $payee->setPhone(self::$phone);
     return $payee;
 }