How to highlight nodes when searching in Xamarin.Forms TreeView (SfTreeView)

<StackLayout>
    <SearchBar Placeholder="Search TreeView" x:Name="searchBar"/>
    <syncfusion:SfTreeView x:Name="treeView" ChildPropertyName="SubFiles" ItemTemplateContextType="Node" 
                            AutoExpandMode="AllNodesExpanded" ItemsSource="{Binding ImageNodeInfo}">
        <syncfusion:SfTreeView.ItemTemplate>
            <DataTemplate>
                <Grid x:Name="grid" RowSpacing="0" BackgroundColor="{Binding Content.NodeColor}">
                    <Grid.ColumnDefinitions>
                        <ColumnDefinition Width="40" />
                        <ColumnDefinition Width="*" />
                    </Grid.ColumnDefinitions>
                    <Image Source="{Binding Content.ImageIcon}" VerticalOptions="Center" HorizontalOptions="Center" 
                            HeightRequest="35" WidthRequest="35"/>
                    <Grid Grid.Column="1" RowSpacing="1" Padding="1,0,0,0" VerticalOptions="Center">
                        <Label LineBreakMode="NoWrap" Text="{Binding Content.ItemName}" VerticalTextAlignment="Center"/>
                    </Grid>
                </Grid>
            </DataTemplate>
        </syncfusion:SfTreeView.ItemTemplate>
    </syncfusion:SfTreeView>
</StackLayout>

namespace TreeViewXamarin
{
    public class Behavior : Behavior<ContentPage>
    {
        SearchBar SearchBar;
        SfTreeView TreeView;
 
        protected override void OnAttachedTo(ContentPage bindable)
        {
            SearchBar = bindable.FindByName<SearchBar>("searchBar");
            TreeView = bindable.FindByName<SfTreeView>("treeView");
 
            SearchBar.TextChanged += SearchBar_TextChanged;
 
            base.OnAttachedTo(bindable);
        }
 
        private void SearchBar_TextChanged(object sender, TextChangedEventArgs e)
        {
            this.TraverseNodes(TreeView.Nodes, e.NewTextValue);
        }
 
        /// <summary>
        /// Recursively traverse all the nodes in the TreeView and sets the BackgroundColor for the searched nodes. 
        /// </summary>
        /// <param name="nodes">Represents the TreeViewNodes.</param>
        /// <param name="searchText">Represents the search key word.</param>
        private void TraverseNodes(TreeViewNodeCollection nodes, string searchText)
        {
            foreach (var child in nodes)
            {
                (child.Content as FileManager).NodeColor = (child.Content as FileManager).ItemName.ToLower().StartsWith(searchText.ToLower()) ? Color.Teal : Color.Transparent;
 
                if (string.IsNullOrEmpty(searchText)) (child.Content as FileManager).NodeColor = Color.Transparent;
 
                if (child.ChildNodes != null)
                {
                    this.TraverseNodes(child.ChildNodes, searchText);
                }
            }
        }
    }
}