{"ast_node_type":"other","tokens":[{"end":74,"kind":"keyword","start":0,"text":"impl<I:"}]}
impl<I: rustc_type_ir::Interner> IntoDiagArg for rustc_type_ir::FnSig<I> {
    fn into_diag_arg(self, path: &mut Option<std::path::PathBuf>) -> DiagArgValue {