What's the correct way to style the LineNumberMargin?

[Max-H-0]

I'd like to get this:

To look more like this:

I tried it like this

    <Style Selector="ae|TextEditor">
        <Style Selector="^ > ItemsControl">
            <Setter Property="Width" Value="80"/>
            
            <Style Selector="^ > aee|LineNumberMargin">
                <Setter Property="Width" Value="30"/>
            </Style>
            
            <Style Selector="^ >Line">
                <Setter Property="Margin" Value="25,0,2,0"/>
            </Style>
        </Style>
    </Style>

(also with /template/)
but couldn't get anything to change

Is this even the correct way to achieve what I'm going for?
In case it is, what are the correct selectors?

[NickRimmer]

Dirty solution to override vertical line, but this is a hack and can stop working with future Editor updates

if (_textEditor.TextArea.LeftMargins.Count >= 2 && _textEditor.TextArea.LeftMargins[1] is Line)
{
    var line = new Line
    {
        StartPoint = new Point(0, 0),
        EndPoint = new Point(0, 1),
        StrokeDashArray = new AvaloniaList<double> { 0, 2 },
        Stretch = Stretch.Fill,
        StrokeThickness = 1,
        StrokeLineCap = PenLineCap.Round,
        Margin = new Thickness(10, 0, 20, 0),
        Tag = Tag
    };
    
    _textEditor.TextArea.LeftMargins.RemoveAt(1);
    _textEditor.TextArea.LeftMargins.Insert(1, line);
    
    var lineNumbersForeground = new Binding("LineNumbersForeground") { Source = _textEditor };
    line.Bind(Shape.StrokeProperty, lineNumbersForeground);
}

Tested with Demo project

[NickRimmer]

I added PR to set margins easier (;
#402

[Max-H-0]

Thank you!