How to customize the floatwindow template of WPF DockingManager?

<Window.Resources>
  <ResourceDictionary>
    <ResourceDictionary.MergedDictionaries>
      <ResourceDictionary Source="/Syncfusion.Tools.WPF;component/Framework/DockingManager/Themes/vista.aero.xaml"/>
    </ResourceDictionary.MergedDictionaries>
    <ControlTemplate x:Key="FloatWindowTemplate" TargetType="{x:Type ContentControl}">
      <AdornerDecorator>
        <DockPanel Focusable="False" LastChildFill="True" Opacity="{Binding Path=Opacity, RelativeSource={RelativeSource AncestorType={x:Type Syncfusion:IWindow}}}" >
          <Border Name="FloatWindowOutBorder"  Focusable="False"
                  BorderBrush="{StaticResource Aero.FloatHeaderBorderBrush}"
                  BorderThickness="{StaticResource SingleThickness}"
                  Background="{StaticResource Default.WindowBackground}" >
            <Grid Focusable="False">
              <Grid.RowDefinitions>
                <RowDefinition Name="TopRow" Style="{StaticResource RowDefinitionStyle}" />
                <RowDefinition Height="*" />
                <RowDefinition Name="BottomRow" Height="7" />
              </Grid.RowDefinitions>
              <Grid.ColumnDefinitions>
                <ColumnDefinition Name="LeftCol" Width="7" />
                <ColumnDefinition Width="*" />
                <ColumnDefinition Name="RightCol" Width="7" />
              </Grid.ColumnDefinitions>
              <Syncfusion:FloatWindowBorder BorderMode="LeftTop" Name="BorderLeftTop" Grid.Column="0" Grid.Row="0" />
              <Syncfusion:FloatWindowBorder BorderMode="Header" Height="30" Name="BorderHeader" Grid.Column="1" Grid.Row="0" />
              <Syncfusion:FloatWindowBorder BorderMode="RightTop" Name="BorderRightTop" Grid.Column="2" Grid.Row="0"/>
              <Syncfusion:FloatWindowBorder BorderMode="Left" Name="BorderLeft" Grid.Column="0" Grid.Row="1" />
              <ContentPresenter Name="ContentPresenter" Grid.Column="1" Grid.Row="1" ContentTemplate="{TemplateBinding ContentControl.ContentTemplate}" Content="{TemplateBinding ContentControl.Content}"/>
                <Syncfusion:FloatWindowBorder BorderMode="Right" Name="BorderRight" Grid.Column="2" Grid.Row="1" />
                <Syncfusion:FloatWindowBorder BorderMode="LeftBottom" Name="BorderLeftBottom" Grid.Column="0" Grid.Row="2" />
                <Syncfusion:FloatWindowBorder BorderMode="Bottom" Name="BorderBottom" Grid.Column="1" Grid.Row="2" />
                <Syncfusion:FloatWindowBorder BorderMode="RightBottom" Name="BorderRightBottom" Grid.Column="2" Grid.Row="2" />
            </Grid>
          </Border>
        </DockPanel>
      </AdornerDecorator>
    </ControlTemplate>
  </ResourceDictionary>
</Window.Resources>
 
<Grid>
  <Syncfusion:DockingManager x:Name="DockingManager" UseDocumentContainer="True" DockFill="True" FloatWindowTemplate="{StaticResource FloatWindowTemplate}">
    <ContentControl x:Name="contentcontrol" Syncfusion:DockingManager.Header="Window1" Syncfusion:DockingManager.State="Dock" />
    <ContentControl x:Name="contentcontrol2" Syncfusion:DockingManager.Header="Window2" Syncfusion:DockingManager.State="Dock"/>
    <ContentControl x:Name="contentcontrol3" Syncfusion:DockingManager.Header="Window3" Syncfusion:DockingManager.State="Dock"/>
  </Syncfusion:DockingManager>
</Grid>