{"ast_node_type":"variable","tokens":[{"end":38,"kind":"keyword","start":0,"text":"if"}]}
                if let Some(b) = r.1 {
                let r = self.match_self_param(self_binding, current, local)?;
                    self.set_terminator(b, TerminatorKind::Unreachable, MirSpan::SelfParam);