Zava

Results 3 issues of Zava

hi, here is the code, and will compile for `(A,)`, but can't compile for `(A, B)`. here is the code in the [playgoround](https://play.rust-lang.org/?version=stable&mode=debug&edition=2021&gist=faa1b1c11c55001253a1f993e8af2e17) ```rust use async_trait::async_trait; struct Text; #[async_trait] trait...

It's time.

feature

see: https://github.com/square/javapoet > If you'd like an alternative that supports the latest Java language features, one option is [Palantir's JavaPoet](https://github.com/palantir/javapoet). maybe we should switch to palantir/javapoet