<my:DockableContent Margin="0,247,0,0" Title="Foldout" IsEnabled="True">
            <TabControl Height="134" VerticalAlignment="Top">
                <TabItem Header="Mix" Margin="-2,-2,-28.81,-1"/>
                <TabItem Header="Arrangement" Margin="28.644,-2,-33.309,-1"/>
                <TabItem Header="Editor" HorizontalAlignment="Right" Margin="0,-2,-33.2,-1" Width="48.5"/>
                <TabItem Header="Tools" Margin="32.684,-2.667,-40.667,-0.333"/>
            </TabControl>
        </my:DockableContent>