Devexpress WPF : loading decorator change content

<dx:LoadingDecorator Name="ld" SplashScreenDataContext="{Binding}">
    <dx:LoadingDecorator.SplashScreenTemplate>
        <DataTemplate>
            <dx:WaitIndicator DeferedVisibility="True" Content="{Binding SomeProperty}"/>
        </DataTemplate>
    </dx:LoadingDecorator.SplashScreenTemplate>
...