Migrating classes not inhering or having dependencies to EntityBasic

src/Umbraco.Core/Models/ContentEditing/IErrorModel.cs

@@ -0,0 +1,17 @@
+using System.Collections.Generic;
+
+namespace Umbraco.Web.Models.ContentEditing
+{
+    public interface IErrorModel
+    {
+        /// <summary>
+        /// This is used for validation of a content item.
+        /// </summary>
+        /// <remarks>
+        /// A content item can be invalid but still be saved. This occurs when there's property validation errors, we will
+        /// still save the item but it cannot be published. So we need a way of returning validation errors as well as the
+        /// updated model.
+        /// </remarks>
+        IDictionary<string, object> Errors { get; set; }
+    }
+}