```php
class HomePage extends Page
{
    private static $many_many = [
        'HeroImages' => [
            'through' => PageImageLink::class,
            'from' => 'Page',
            'to' => 'Image',
        ]
    ];

}
```

```php
class PageImageLink extends DataObject
{
    private static $has_one = [
        'Page' => SiteTree::class,
        'Image' => Image::class,
    ];
}

This fails because the linking object's relation class doesn't exactly match the owner. Sharing the linking objects across various entries in the ancestry should be a supported use case.