{"ast_node_type":"other","tokens":[{"end":87,"kind":"keyword","start":0,"text":"for"}]}
                        for (_, node) in self.infcx.tcx.hir_parent_iter(upvar_hir_id) {
                    if upvar_ident.name == kw::SelfLower {
                            if let Some(fn_decl) = node.fn_decl() {