{"ast_node_type":"other","tokens":[{"end":91,"kind":"keyword","start":0,"text":"PolyFnSig,"}]}
    PolyFnSig, ScalarInt, TraitDef, TraitRef, Ty, TyCtxt, TyKind, TypeVisitableExt, UintTy,
    ExistentialTraitRef, FnSig, GenericArgsRef, Instance, InstanceKind, IntrinsicDef, List,
    ValTree, VariantDef,