File Layout Method name Regex not picking up Methods

I have DependencyProperty Callback methods that look something like this:

private static void DrawingPointsChangedCallback(DependencyObject d, DependencyPropertyChangedEventArgs e) => ((RaumPolygonControl)d).OnDrawingPointsChanged(e);

However the following Filepattern XAML doesn't pick them up.

I've tried a few variations already, however none have worked:

• ^.*Callback$
• Callback$
• .*Callback$
• ^.*Callback^.$
• ^.*Callback$
• Callback

<Region Name="Callbacks">
  <Entry DisplayName="Callback Methoden" Priority="100">
    <Entry.Match>
      <And>
        <Kind Is="Method" />
        <Name Is="^.*Callback" />
      </And>
    </Entry.Match>
    <Entry.SortBy>
      <Name />
    </Entry.SortBy>
  </Entry>
</Region>