Consider this code:

```
typedef struct tagFoo Foo;

struct Bar {
    int x;
};

typedef struct tagFoo {
    struct Bar bar;
} Foo;
```

This generates an invalid layout for tagFoo:

```
private static final GroupLayout $LAYOUT = MemoryLayout.structLayout(
        tagFoo.Bar.$LAYOUT().withName("bar")
    ).withName("tagFoo");
```

Note how this refers to tagFoo.Bar, which looks like a nested class, but in reality jextract has generated a toplevel Bar.