apply_filters('pmpro_payflow_void_nvpstr', $nvpStr, $this);apply_filters('pmpro_payflow_void_nvpstr', $nvpStr, $this); Source File: https://github.com/strangerstudios/paid-memberships-pro/blob/master/classes/gateways/class.pmprogateway_payflowpro.php View in Source Code