Index: Ringtoets/Common/src/Ringtoets.Common.Data/Calculation/CalculationGroup.cs
===================================================================
diff -u -r17b11c850b35c3ea99150ba25098b5b769b58f4f -rfb83f35cff901948b621ab14c2064590b33f17a0
--- Ringtoets/Common/src/Ringtoets.Common.Data/Calculation/CalculationGroup.cs	(.../CalculationGroup.cs)	(revision 17b11c850b35c3ea99150ba25098b5b769b58f4f)
+++ Ringtoets/Common/src/Ringtoets.Common.Data/Calculation/CalculationGroup.cs	(.../CalculationGroup.cs)	(revision fb83f35cff901948b621ab14c2064590b33f17a0)
@@ -21,6 +21,7 @@
 
 using System;
 using System.Collections.Generic;
+using System.Linq;
 using Core.Common.Base;
 using Ringtoets.Common.Data.Properties;
 
@@ -59,7 +60,7 @@
         /// <summary>
         /// Gets the children that define this group.
         /// </summary>
-        public IList<ICalculationBase> Children { get; }
+        public IList<ICalculationBase> Children { get; private set; }
 
         public string Name
         {
@@ -79,7 +80,11 @@
 
         public object Clone()
         {
-            throw new NotImplementedException();
+            var clone = (CalculationGroup) MemberwiseClone();
+
+            clone.Children = Children.Select(c => (ICalculationBase) c.Clone()).ToArray();
+
+            return clone;
         }
     }
 }
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