{"ast_node_type":"variable","tokens":[{"end":89,"kind":"keyword","start":0,"text":"if"}]}
        if let &hir::ExprKind::Closure(&hir::Closure { kind, fn_decl_span, .. }) = expr {
        debug!("closure_span: hir_id={:?} expr={:?}", hir_id, expr);
            for (captured_place, place) in