@@ -0,0 +1,10 @@
+﻿namespace Microsoft.Azure.Cosmos.CosmosElements
+{
+    internal abstract class CosmosNull : CosmosElement
+    {
+        protected CosmosNull()
+            : base(CosmosElementType.Null)
+        {
+        }
+    }
+}
does this class (also Boolean) need to be abstract?