Proxy chain is possible in WinFsp?

[codechef93]

Hello.
I am using WinFsp to build my custom file system and get to know that WinFsp has better performance and is robust and reliable.
Thanks to WinFsp.
Nowadays I come up with interesting problem.
Using passthrough file system, I proxied folder "A" to folder "B".(So when you open A, you go to B)
And proxied A's parent folder to disk drive.
When I open disk drive, it lists folder A. But when I open folder A, it shows windows error message that it cannot be accessible.
Is this kind of proxy not supported in WinFsp?
Do I need to customize code of WinFsp to implement this approach?
Or do I need to change passthrough code?
I am not sure what this kind of situation is called but as I googled a bit, it was called proxy chaining.
I want appreciable advice from everybody.
Thanks.