Shaker/Avalonia/SukiUI/Controls/Stepper.axaml

<ResourceDictionary xmlns="https://github.com/avaloniaui"
                    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
                    xmlns:controls="clr-namespace:SukiUI.Controls">
    <ControlTheme x:Key="SukiStepperStyle" TargetType="controls:Stepper">
        <Setter Property="Template">
            <ControlTemplate>
                <Grid Name="PART_GridStepper" />
            </ControlTemplate>
        </Setter>
    </ControlTheme>
    <ControlTheme x:Key="{x:Type controls:Stepper}"
                  BasedOn="{StaticResource SukiStepperStyle}"
                  TargetType="controls:Stepper" />
</ResourceDictionary>