More scanner improvements, up to 50% off (#4243)

Co-authored-by: majora2007 <josephmajora@gmail.com>

API/Extensions/EnumerableExtensions.cs

@@ -69,4 +69,10 @@ public static class EnumerableExtensions
 
         return q;
     }
+
+    public static IEnumerable<TSource> WhereNotNull<TSource>(this IEnumerable<TSource?> source)
+    where TSource : class
+    {
+        return source.Where(item => item != null)!;
+    }
 }