{"ast_node_type":"other","tokens":[{"end":99,"kind":"keyword","start":0,"text":"//!"}]}
//! * By **copying** the whole rustc `lib_proc_macro` code, we are able to build this with `stable`
//!   RA than `proc-macro2` token stream.
//!   rustc rather than `unstable`. (Although in general ABI compatibility is still an issue)…