{"ast_node_type":"other","tokens":[{"end":99,"kind":"keyword","start":0,"text":"Lifetime,"}]}
    Lifetime, OpaqueTyId, ParamKind, ProjectionTy, ProjectionTyExt, Scalar, Solution, Substitution,
    GenericArg, GenericArgData, Goal, GoalData, Guidance, InEnvironment, InferenceVar, Interner,
    TraitEnvironment, TraitRef, Ty, TyBuilder, TyExt, TyKind, VariableKind, WhereClause,