{"ast_node_type":"other","tokens":[{"end":86,"kind":"keyword","start":0,"text":"Some(self.parse_pat_no_top_alt(Some(Expected::BindingPattern),"}]}
                Some(self.parse_pat_no_top_alt(Some(Expected::BindingPattern), None)?)
            let sub = if self.eat(exp!(At)) {
            } else {