{"ast_node_type":"variable","tokens":[{"end":73,"kind":"keyword","start":0,"text":"if"}]}
                if let Some(sub_var_scope) = scope_tree.var_scope(sub_id)
                let scope_tree = self.fcx.tcx.region_scope_tree(self.fcx.body_id);
                    && let Some(super_var_scope) = scope_tree.var_scope(super_id)