WPF Getting a RegionName from a View Class

WPF application, using Prism.

I am using a multi phase module initialiser and in the initialisation of the module I would like the module to self inspect the views and register any regions defined within.

I am using something similar to the code below to self inspect view model classes and register other things, but I have no idea how to reflect into a view.

        protected void SelfInspectRegions()
    {
        var assm = Assembly.GetAssembly(this.GetType()).GetTypes();
        foreach (var type in assm)
        {
            if(type.IsSubclassOf(typeof(UserControl)))
            {
                var a = type;
            }
        }
    }

An example of a Tab based region (defined on a View/UserControl) I would like to self register is below;

                <controls:ChTabControlModelAware x:Name="OrderProcessingDocumentDetailRegion"  
                                                           cal:RegionManager.RegionManager="{Binding RegionManager, RelativeSource={RelativeSource Mode=FindAncestor, AncestorType={x:Type shells:FormShell}}}"
                                                           cal:RegionManager.RegionName="Order Processing:DocumentDetailRegion"
                                                           cal:RegionManager.RegionContext="{Binding DataContext, RelativeSource={RelativeSource Mode=FindAncestor, AncestorType={x:Type UserControl}}}"
                                                           Grid.Row="3" Grid.Column="1" Grid.ColumnSpan="1" VerticalAlignment="Stretch"
                                                           HorizontalAlignment="Stretch">

                    <bindings:EventToCommandBehavior.EventBindings>
                        <bindings:EventBinding Command="{Binding SelectedDetailTabChangedCommand}"
                                  CommandParameter="{Binding RelativeSource={RelativeSource AncestorType=controls:TabControl}, Path= SelectedItem.DataContext.HeaderInfo}"
                                  EventName="SelectionChanged" RaiseOnHandledEvents="True"
                                  PassEventArgsToCommand="True" />
                    </bindings:EventToCommandBehavior.EventBindings>
                </controls:ChTabControlModelAware>

Principally I would like to extract the RegionName defined in the line;

cal:RegionManager.RegionName="Order Processing:DocumentDetailRegion"

I am not sure how to do this and any help would be gratefully received

Many Thanks

Lance