Why "does not support multiple pending requests"

I install XIFF 3.0.0 beta, and want to add contacts more than one into roster for each add operation, but I found just last one can receive “subscript” requirement, why?

I found a comment on package class “org.jivesoftware.xiff.im.Roster” that is “does not support multiple pending requests”, I don’t know the reason why fixed with this from author!

And I want upgrade it to support “multiple pending requests”, but don’t know where will trap/hook me, so anyone can help to list all of trap, thanks

Please use the latest version from SVN.

There the same issue still exists but solution might be ease.

Would you like to fix it by proving a patch?