{"ast_node_type":"other","tokens":[{"end":55,"kind":"keyword","start":0,"text":"Some(TraitSolverLangItem::AsyncFn)"}]}
                Some(TraitSolverLangItem::AsyncFn) => {
                }
                    G::consider_builtin_async_fn_trait_candidates(self, goal, ty::ClosureKind::Fn)