<ResourceDictionary xmlns="https://github.com/avaloniaui" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
    <StaticResource x:Key="ExpanderHeaderFontWeight" ResourceKey="SemiFontWeightBold" />
    <StaticResource x:Key="ExpanderIconSize" ResourceKey="SemiWidthIconExtraSmall" />
    <Thickness x:Key="ExpanderIconMargin">8 0 0 0</Thickness>
    <StaticResource x:Key="ExpanderIcon" ResourceKey="SemiIconChevronDown" />
    <Thickness x:Key="ExpanderHeaderMargin">8 4</Thickness>
    <StaticResource x:Key="ExpanderHeaderPadding" ResourceKey="SemiThicknessTight" />
    <Thickness x:Key="ExpanderContentMargin">16 4 16 8</Thickness>
    <Thickness x:Key="ExpanderDownContentBorderThickness">0 0 0 1</Thickness>
    <Thickness x:Key="ExpanderUpContentBorderThickness">0 1 0 0</Thickness>
    <Thickness x:Key="ExpanderLeftContentBorderThickness">1 0 0 0</Thickness>
    <Thickness x:Key="ExpanderRightContentBorderThickness">0 0 1 0</Thickness>
</ResourceDictionary>