{"ast_node_type":"other","tokens":[{"end":62,"kind":"keyword","start":0,"text":"//"}]}
        // subject/anon_const_instance_printing/near/135980032
        // https://rust-lang.zulipchat.com/#narrow/stream/146212-t-compiler.2Fconst-eval/
        let instance = with_no_trimmed_paths!(key.value.instance.to_string());