{"ast_node_type":"other","tokens":[{"end":76,"kind":"keyword","start":0,"text":"ImplTraitPosition::ExternFnReturn"}]}
            ImplTraitPosition::ExternFnReturn => "`extern fn` return types",
            ImplTraitPosition::FnTraitParam => "the parameters of `Fn` trait bounds",
            ImplTraitPosition::ClosureReturn => "closure return types",