{"ast_node_type":"other","tokens":[{"end":67,"kind":"keyword","start":0,"text":"Solution,"}]}
    Solution, Substitution, TraitEnvironment, Ty, TyBuilder, TyExt,
    Canonical, DomainGoal, FnAbi, FnPointer, FnSig, Guidance, InEnvironment, Interner, Lifetime,
    autoderef::{Autoderef, AutoderefKind},