Adds ContentApps to the Composition extension methods

src/Umbraco.Web/CompositionExtensions.cs

@@ -10,6 +10,7 @@ using Umbraco.Web.Mvc;
 using Umbraco.Web.PublishedCache;
 using Umbraco.Web.Routing;
 using Umbraco.Web._Legacy.Actions;
+using Umbraco.Web.ContentApps;
 
 // the namespace here is intentional -  although defined in Umbraco.Web assembly,
 // this class should be visible when using Umbraco.Core.Components, alongside
@@ -32,7 +33,15 @@ namespace Umbraco.Core.Components
         /// <returns></returns>
         internal static ActionCollectionBuilder Actions(this Composition composition)
             => composition.Container.GetInstance<ActionCollectionBuilder>();
-        
+
+        /// <summary>
+        /// Gets the content apps collection builder.
+        /// </summary>
+        /// <param name="composition">The composition.</param>
+        /// <returns></returns>
+        public static ContentAppDefinitionCollectionBuilder ContentApps(this Composition composition)
+            => composition.Container.GetInstance<ContentAppDefinitionCollectionBuilder>();
+
         /// <summary>
         /// Gets the content finders collection builder.
         /// </summary>