bookingpress_allowed_payment_gateway_for_refund

    add_filter('bookingpress_allowed_payment_gateway_for_refund', 'bookingpress_allowed_payment_gateway_for_refund_func', 10);
    function bookingpress_allowed_payment_gateway_for_refund_func($payment_gateway_data)
    {
        //$payment_gateway_data Payment gateway settings

        return $payment_gateway_data;

    }