{"ast_node_type":"variable","tokens":[{"end":77,"kind":"keyword","start":0,"text":"let"}]}
                let span = if matches!(is_target_ty, IsFirstInputType::Yes) {
            for &(mut ty, is_target_ty) in &tys {
                    // Point at `D<A>` in `impl<A, B> for C<B> in D<A>`