Generic type arguments issue

[ChebanovDD]

Describe the bug

Only the first generic argument is presented in the UxmlTraits.

Minimal reproduction code and steps

Create a control with a complex BaseType like the following:

[UxmlElement]
public partial class BindableImageListView : BindableListView<ImagesItemViewModel, ReusableItemsList<ImagesItemViewModel>>
{
    [UxmlAttribute(10)]
    public int ItemsCacheCapacity { get; set; }
}

Current result

public new class UxmlTraits : BindableListView<ImagesItemViewModel>.UxmlTraits
{
    ...
}

Expected result

public new class UxmlTraits : BindableListView<ImagesItemViewModel, ReusableItemsList<ImagesItemViewModel>>.UxmlTraits
{
    ...
}