Index: Ringtoets/Common/src/Ringtoets.Common.Data/BaseFailureMechanism.cs
===================================================================
diff -u -r8dec462b18aff76313f2836309ef24ddd2f70b50 -rf98cc7191a717793f69485dad2923cd34f6d48de
--- Ringtoets/Common/src/Ringtoets.Common.Data/BaseFailureMechanism.cs	(.../BaseFailureMechanism.cs)	(revision 8dec462b18aff76313f2836309ef24ddd2f70b50)
+++ Ringtoets/Common/src/Ringtoets.Common.Data/BaseFailureMechanism.cs	(.../BaseFailureMechanism.cs)	(revision f98cc7191a717793f69485dad2923cd34f6d48de)
@@ -20,6 +20,7 @@
 // All rights reserved.
 
 using System;
+using System.Collections.Generic;
 using Core.Common.Base;
 using Ringtoets.Common.Data.Properties;
 
@@ -59,6 +60,8 @@
         /// </summary>
         public string Name { get; protected set; }
 
+        public abstract IEnumerable<ICalculationItem> CalculationItems { get; }
+
         /// <summary>
         /// Gets or sets the unique identifier for the storage of the class.
         /// </summary>