{"ast_node_type":"other","tokens":[{"end":41,"kind":"keyword","start":0,"text":"//!"}]}
//!   RA than `proc-macro2` token stream.
//! * We use `tt` for proc-macro `TokenStream` server, it is easier to manipulate and interact with
//! * By **copying** the whole rustc `lib_proc_macro` code, we are able to build this with `stable`