Braintree\Transaction::void PHP Method

    public static function void($transactionId)
    {
        return Configuration::gateway()->transaction()->void($transactionId);
    }

 /**
  * @param string $transactionId
  * @return \Braintree\Result\Successful|\Braintree\Result\Error
  */
 public function void($transactionId)
 {
     return Transaction::void($transactionId);
 }