About S2Member Pro integration with AliPay Escrow

Currently S2Member only support AliPay Direct Pay.
In China AliPay Escrow is widely used as it reduces the risk of buyers. Will S2Member support AliPay Escrow interface?
If I want to do it on my own, is there any developer guide for this?
PS: I've downloaded S2member Pro Ex which contains third-party API documents. But couldn't find a developer guide to integrate a third-party escrow interface to S2Member Pro.
Thanks,
John
In China AliPay Escrow is widely used as it reduces the risk of buyers. Will S2Member support AliPay Escrow interface?
If I want to do it on my own, is there any developer guide for this?
PS: I've downloaded S2member Pro Ex which contains third-party API documents. But couldn't find a developer guide to integrate a third-party escrow interface to S2Member Pro.
Thanks,
John