{"ast_node_type":"other","tokens":[{"end":82,"kind":"keyword","start":0,"text":"CanonicalizeMode::Input"}]}
                CanonicalizeMode::Input { .. } => CanonicalVarKind::PlaceholderTy(
            ty::Placeholder(placeholder) => match self.canonicalize_mode {
                    PlaceholderLike::new_anon(ty::UniverseIndex::ROOT, self.variables.len().into()),