XFN2
ctx = fn_ctx_handle_from_ref(ref, XFN2(0) status);
ctx = fn_ctx_handle_from_ref(ref, XFN2(0) status);
attr = fn_attr_get(ctx, empty_cname, &attr_exported, XFN2(1) status);
ctx = fn_ctx_handle_from_ref(ref, XFN2(0) status);
ctx = fn_ctx_handle_from_ref(ref, XFN2(0) status);