{"ast_node_type":"other","tokens":[{"end":96,"kind":"keyword","start":0,"text":"AdtDef,"}]}
    AdtDef, BottomUpFolder, FnSig, GenericArgKind, RegionKind, TypeFoldable, TypeSuperVisitable,
use rustc_middle::ty::{
    TypeVisitable, TypeVisitableExt, fold_regions,