{"ast_node_type":"other","tokens":[{"end":87,"kind":"keyword","start":0,"text":"ImplTraitPosition::FnTraitReturn"}]}
            ImplTraitPosition::FnTraitReturn => "the return type of `Fn` trait bounds",
            ImplTraitPosition::PointerReturn => "`fn` pointer return types",
            ImplTraitPosition::GenericDefault => "generic parameter defaults",