WPF Style Trigger on Context

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WPF

infragistics

I am able to use a ValueConverter to do what I need to, but would like to change this to a tigger. My problem is how to refer to the Content:

<Style x:Key="BrokerCellPresenter2"
       TargetType="{x:Type igDP:CellValuePresenter}">
  <Style.Resources>
    <Converters:IfTrueValueConverter x:Key="InvisibleIfNullConverter"
                                     TrueValue="Visible"
                                     FalseValue="Hidden"
                                     NullValue="Hidden" />
  </Style.Resources>
  <Setter Property="Template">
    <Setter.Value>
      <ControlTemplate TargetType="{x:Type igDP:CellValuePresenter}">
        <Border Name="border"
                Visibility="{TemplateBinding Content, Converter={StaticResource InvisibleIfNullConverter}}"
                removed="#A50021"
                HorizontalAlignment="Stretch"
                VerticalAlignment="Stretch">
          <Polygon Points="1,0 0,1 4,5 0,9 1,10 5,6 9,10 10,9 6,5 10,1 9,0 5,4"
                   Fill="White"
                   HorizontalAlignment="Center"
                   VerticalAlignment="Center" />
        </Border>
        <!--<ControlTemplate.Triggers>
          <DataTrigger Binding="{TemplateBinding Content}"
                       Value="true">
            <Setter TargetName="border"
                    Property="Visibility"
                    Value="Visible" />
          </DataTrigger>
        </ControlTemplate.Triggers>-->
      </ControlTemplate>
    </Setter.Value>
  </Setter>
</Style>

I have the trigger commented out because I cannot seem to get the content which is a boolean. Only want the x to display if the value is true.