{"ast_node_type":"other","tokens":[{"end":93,"kind":"keyword","start":0,"text":"(Some(FnTrait::FnMut),"}]}
                    (Some(FnTrait::FnMut), FnTrait::Fn) => expected_kind = Some(FnTrait::Fn),
                    (None, _) => expected_kind = Some(closure_kind),
                    (Some(FnTrait::FnOnce), FnTrait::Fn | FnTrait::FnMut) => {