{"ast_node_type":"other","tokens":[{"end":54,"kind":"keyword","start":0,"text":"Substitution,"}]}
    Substitution, TraitEnvironment, Ty, TyExt, TyKind,
    CallableDefId, ClosureId, Const, ConstScalar, InferenceResult, Interner, MemoryMap,
    consteval::usize_const,