{"ast_node_type":"other","tokens":[{"end":65,"kind":"keyword","start":0,"text":"CanonicalVarKind::PlaceholderTy(placeholder)"}]}
                CanonicalVarKind::PlaceholderTy(placeholder) => {
                CanonicalVarKind::Const(u) => CanonicalVarKind::Const(reverse_universe_map[&u]),
                    CanonicalVarKind::PlaceholderTy(ty::Placeholder {