{"ast_node_type":"other","tokens":[{"end":121,"kind":"keyword","start":0,"text":"//"}]}
                        // We simply produce identifier `$crate` here. And it will be resolved when lowering ast to Path.
                    tt::Leaf::Ident(ident) if ident.sym == sym::crate_ => {
                        Op::Ident(tt::Ident {