Updated the "IMntpConverter" interface a bit

The "Convert" method had a "source" parameter of type "object", but as the type will always be an instance of "IPublishedContent", the interface has now been updated to reflect this.

Author: abjerner

src/Skybrud.Umbraco.MultiNodeTreePicker/Converters/IMntpItemConverter.cs

@@ -9,7 +9,7 @@ public interface IMntpItemConverter {
         [JsonProperty("name")]
         string Name { get; }
 
-        object Convert(IPublishedPropertyType propertyType, object source);
+        object Convert(IPublishedPropertyType propertyType, IPublishedContent source);
 
         Type GetType(IPublishedPropertyType propertyType);
 

src/Skybrud.Umbraco.MultiNodeTreePicker/Converters/MntpGenericItemConverter.cs

@@ -14,15 +14,11 @@ protected MntpGenericItemConverter(string name, Func<IPublishedContent, T> callb
             Callback = callback;
         }
 
-        public object Convert(IPublishedPropertyType propertyType, object source) {
-
-            if (source is IPublishedContent content) return Callback(content);
-
-            return null;
-
+        public virtual object Convert(IPublishedPropertyType propertyType, IPublishedContent source) {
+            return source is null ? null : Callback(source);
         }
 
-        public Type GetType(IPublishedPropertyType propertyType) {
+        public virtual Type GetType(IPublishedPropertyType propertyType) {
             return typeof(T);
         }