lib/Api/ChargesApi.php
public function chargesCancel($id, $idempotency_key = null)
    {
        list($response) = $this->chargesCancelWithHttpInfo($id, $idempotency_key);
        return $response;
    }
public function chargesCancel($id, $idempotency_key = null)
    {
        list($response) = $this->chargesCancelWithHttpInfo($id, $idempotency_key);
        return $response;
    }
Operation chargesCancel

Cancel a charge

@param string $id The id of the authorised charge (required)
@param string $idempotency_key The unique idempotency key. (optional)
@throws \zipMoney\ApiException on non-2xx response
@return \zipMoney\Model\Charge