Is there any way to hide tabs within a ContextualTabGroup?

<ribbon:RibbonWindow
    x:Class="ContextMenuSample.MainWindow"
    x:Name="MyMainWindow"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:ribbon="http://schemas.actiprosoftware.com/winfx/xaml/ribbon"
    Height="350"
    Width="525"
    >
    <Grid>
        <Grid.RowDefinitions>
            <RowDefinition Height="auto" />
            <RowDefinition />
        </Grid.RowDefinitions>
        <ribbon:Ribbon x:Name="MyRibbon" />
        <StackPanel Grid.Row="1">
            <Button Content="Click to show context group 1" Click="Button_Click" />
        </StackPanel>
    </Grid>
</ribbon:RibbonWindow>

using System.Linq;
using System.Windows;
using ActiproSoftware.Windows.Controls.Ribbon.Controls;

namespace ContextMenuSample
{
    public partial class MainWindow
    {
        public MainWindow()
        {
            InitializeComponent();

            ContextualTabGroup group = new ContextualTabGroup { Label = "Search" };
            Tab tab1 = new Tab { Label = "Category 1" };
            Tab tab2 = new Tab { Label = "Category 2" };
            group.Items.Add(tab1);
            group.Items.Add(tab2);

            MyRibbon.ContextualTabGroups.AddRange(new ContextualTabGroup[] { group });
        }

        private void Button_Click(object sender, RoutedEventArgs e)
        {
            ContextualTabGroup group = MyRibbon.ContextualTabGroups[0];
            group.IsActive = true;
            group.Items.OfType<Tab>().First().Visibility = Visibility.Collapsed;
        }
    }
}