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Error executing template "Designs/Swift/Paragraph/Swift_Accordion.cshtml"
System.NullReferenceException: Object reference not set to an instance of an object.
   at CompiledRazorTemplates.Dynamic.RazorEngine_fc9b9a419d6e418b8f463c2a76d97140.ExecuteAsync()
   at RazorEngine.Templating.TemplateBase.Run(ExecuteContext context, TextWriter reader)
   at RazorEngine.Templating.RazorEngineCore.RunTemplate(ICompiledTemplate template, TextWriter writer, Object model, DynamicViewBag viewBag)
   at RazorEngine.Templating.RazorEngineService.Run(ITemplateKey key, TextWriter writer, Type modelType, Object model, DynamicViewBag viewBag)
   at RazorEngine.Templating.DynamicWrapperService.Run(ITemplateKey key, TextWriter writer, Type modelType, Object model, DynamicViewBag viewBag)
   at RazorEngine.Templating.RazorEngineServiceExtensions.Run(IRazorEngineService service, String name, TextWriter writer, Type modelType, Object model, DynamicViewBag viewBag)
   at RazorEngine.Templating.RazorEngineServiceExtensions.<>c__DisplayClass23_0.<Run>b__0(TextWriter writer)
   at RazorEngine.Templating.RazorEngineServiceExtensions.WithWriter(Action`1 withWriter)
   at RazorEngine.Templating.RazorEngineServiceExtensions.Run(IRazorEngineService service, String name, Type modelType, Object model, DynamicViewBag viewBag)
   at Dynamicweb.Rendering.RazorTemplateRenderingProvider.Render(Template template)
   at Dynamicweb.Rendering.TemplateRenderingService.Render(Template template)
   at Dynamicweb.Rendering.Template.RenderRazorTemplate()


  1     @inherits Dynamicweb.Rendering.ViewModelTemplate<Dynamicweb.Frontend.ParagraphViewModel>
@functions 
{
	private string RenderCustomCSS(IEnumerable<string> decorations)
	{
		var cssClasses = new List<string>();
		foreach (var itemId in decorations)
		{
			var item = Dynamicweb.Content.Services.Items.GetItem("Swift_Css", itemId);
			item.TryGetValue("Class", out object classes);
			if (classes is null)
			{
				continue;
			}
			var cssString = (string)classes;
			if (cssString.StartsWith("["))
			{
				var cssArray = Dynamicweb.Core.Converter.Deserialize<string[]>(cssString);
				cssClasses.AddRange(cssArray);
			}
			else
			{
				cssClasses.Add(cssString.Replace(",", " "));
			}
		}
		return string.Join(" ", cssClasses).Trim();
	}
}
@{
	string title = Model.Item.GetString("Title");
	var accordionItems = Model.Item?.GetItems("Accordion_Items") ?? Enumerable.Empty<Dynamicweb.Frontend.ItemViewModel>().ToList();
	string theme = !string.IsNullOrWhiteSpace(Model.Item.GetRawValueString("Theme")) ? " theme " + Model.Item.GetRawValueString("Theme").Replace(" ", "").Trim().ToLower() : "";
	var decorations = Model.Item?.GetList("CssDecorations")?.GetRawValue().OfType<string>() ?? Enumerable.Empty<string>();
	string css = RenderCustomCSS(decorations);
	string contentPadding = Model.Item.GetRawValueString("ContentPadding", "none");
	contentPadding = contentPadding == "none" ? "p-0" : contentPadding;
	contentPadding = contentPadding == "small" ? "p-3 p-md-3" : contentPadding;
	contentPadding = contentPadding == "large" ? "p-5 p-md-5" : contentPadding;
}
<div class="accordion @(theme) @(css) @(contentPadding) h-100 position-relative item_@Model.Item.SystemName.ToLower()" id="accordion-@Pageview.CurrentParagraph.ID">
	@if (!string.IsNullOrEmpty(Model.Item.GetString("Title")) && !Model.Item.GetBoolean("HideTitle"))
	{
		string titleFontSize = Model.Item.GetRawValueString("TitleFontSize", "h2");
		string headingLevel = Model.Item.GetString("HeadingLevel", "h2");
		string headingLevelStart = $"<{headingLevel} class=\"{titleFontSize} mb-4\">";
		string headingLevelStop = $"</{headingLevel}>";
		@headingLevelStart
			@Model.Item.GetString("Title")
		@headingLevelStop
	}
	@foreach (var item in accordionItems)
	{
		<div class="accordion-item">
			<h2 class="accordion-header" id="heading-@Pageview.CurrentParagraph.ID-@item.Id">
				<button class="accordion-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapse-@Pageview.CurrentParagraph.ID-@item.Id" aria-expanded="false" aria-controls="collapse-@Pageview.CurrentParagraph.ID-@item.Id">
					@item.GetString("Title")
				</button>
			</h2>
			<div id="collapse-@Pageview.CurrentParagraph.ID-@item.Id" class="accordion-collapse collapse" aria-labelledby="heading-@Pageview.CurrentParagraph.ID-@item.Id" data-bs-parent="#accordion-@Pageview.CurrentParagraph.ID">
				<div class="accordion-body mb-0-last-child opacity-75">
					@item.GetRawValueString("Content")
				</div>
			</div>
		</div>
	}
	<div id="@Model.ID" class="user-select-none position-absolute top-0" style="scroll-margin-top:var(--header-height,150px)"></div>
</div>