{"ast_node_type":"variable","tokens":[{"end":63,"kind":"keyword","start":0,"text":"if"}]}
                        if let Some(def_id) = def_id.as_local()
                        // FIXME(project-rfc-2229#48): This should be a list of capture names/places
                            && let Some(upvars) = tcx.upvars_mentioned(def_id)