Are module-level fields supported?

I can't generate the documentation of [module-level fields](https://haxe.org/blog/module-level-fields/) no matter what I try.
For this sample:

```haxe
/** A sample typedef. **/
typedef SampleTypedef = {

/** A sample field. **/
var aSampleField: String;
}

/** A sample function. **/
function aSampleFunction() {
// Some code.
}
```

Only the `typedef` appears in the generated documentation.