Index: Ringtoets/Common/src/Ringtoets.Common.Data/Calculation/CalculationGroup.cs
===================================================================
diff -u -rb3b6c13cf736c134476b3db34281332d01ca86b1 -r05b550146738ca33649426a84ba5a6f595a91b18
--- Ringtoets/Common/src/Ringtoets.Common.Data/Calculation/CalculationGroup.cs	(.../CalculationGroup.cs)	(revision b3b6c13cf736c134476b3db34281332d01ca86b1)
+++ Ringtoets/Common/src/Ringtoets.Common.Data/Calculation/CalculationGroup.cs	(.../CalculationGroup.cs)	(revision 05b550146738ca33649426a84ba5a6f595a91b18)
@@ -59,7 +59,7 @@
         /// <summary>
         /// Gets the children that define this group.
         /// </summary>
-        public IList<ICalculationBase> Children { get; private set; }
+        public IList<ICalculationBase> Children { get; }
 
         public string Name
         {
@@ -76,5 +76,10 @@
                 name = value;
             }
         }
+
+        public object Clone()
+        {
+            throw new NotImplementedException();
+        }
     }
 }
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