Updated page for 14

Author: AndyButland

14/umbraco-cms/reference/notifications/sendingallowedchildrennotifications.md

@@ -4,82 +4,6 @@ description: Example of how to use a SendingAllowedChildren Notification
 
 # Sending Allowed Children Notification
 
-The `SendingAllowedChildrenNotification` enables you to manipulate the Document Types that will be shown in the create menu when adding new content in the backoffice.
+The `SendingAllowedChildrenNotification` is no longer available in Umbraco 14 and no replacement is available for this major version.
 
-## Usage
-
-With the example below we can ensure that a Document Type cannot be selected if the type already exists in the Content tree.
-
-```csharp
-using System.Web;
-using Umbraco.Cms.Core.Events;
-using Umbraco.Cms.Core.Notifications;
-
-namespace Umbraco.Docs.Samples.Web.Notifications;
-
-public class SendingAllowedChildrenNotificationHandler : INotificationHandler<SendingAllowedChildrenNotification>
-{
-    public void Handle(SendingAllowedChildrenNotification notification)
-    {
-        const string contentIdKey = "contentId";
-
-            // Try get the id from the content item in the backoffice
-            var queryStringCollection = HttpUtility.ParseQueryString(notification.UmbracoContext.OriginalRequestUrl.Query);
-
-        if (!queryStringCollection.ContainsKey(contentIdKey))
-        {
-            return;
-        }
-
-        var contentId = queryStringCollection[contentIdKey].TryConvertTo<int>().ResultOr(-1);
-
-        if (contentId == -1)
-        {
-            return;
-        }
-
-        var content = notification.UmbracoContext.Content?.GetById(true, contentId);
-
-        if (content is null)
-        {
-            return;
-        }
-
-        // Allowed children as configured in the backoffice
-        var allowedChildren = notification.Children.ToList();
-
-        if (content.ChildrenForAllCultures is not null)
-        {
-            // Get all children of current page
-            var childNodes = content.ChildrenForAllCultures.ToList();
-
-            // If there is a Settings page already created, then don't allow it anymore
-            // You can also use the ModelTypeAlias property from your PublishedModel for comparison,
-            // like Settings.ModelTypeAlias if you have set models builder to generate SourceCode models
-            if (childNodes.Any(x => x.ContentType.Alias == "settings"))
-            {
-                allowedChildren.RemoveAll(x => x.Alias == "settings");
-            }
-        }
-
-        // Update the allowed children
-        notification.Children = allowedChildren;
-    }
-}
-```
-
-You also need to register this notification handler. You can achieve this by updating the `Program` class like:
-
-```csharp
-builder.CreateUmbracoBuilder()
-    .AddBackOffice()
-    .AddWebsite()
-    .AddDeliveryApi()
-    .AddComposers()
-    .AddNotificationHandler<SendingAllowedChildrenNotification, SendingAllowedChildrenNotificationHandler>()
-    .Build();
-```
-
-{% hint style="info" %}
-For more information about registering notifications read the [Registering notification handlers](./) article.
-{% endhint %}
+Please see [content type filters](../../../../15/umbraco-cms/reference/content-type-filters.md) as the supported alternative in Umbraco 15 for use cases that previously relied on this notification.