{"ast_node_type":"variable","tokens":[{"end":77,"kind":"keyword","start":0,"text":"if"}]}
                if let Node::Pat(pat) = self.infcx.tcx.hir_node(upvar_hir_id)
                    && let hir::PatKind::Binding(hir::BindingMode::NONE, _, upvar_ident, _) =