oqtane.framework/Oqtane.Client/Themes/OqtaneTheme/SinglePane.razor

@namespace Oqtane.Themes.OqtaneTheme
@inherits LayoutBase

<div class="row px-4">
    <Pane Name="Content" />
</div>

@code {
    public override string Name => "Single Pane";

    public override string Panes => "Content";
}