Index: Ringtoets/Common/src/Ringtoets.Common.Data/IFailureMechanism.cs
===================================================================
diff -u -rc6a3cd9e25138d35bf0881f3ff6df9dfe1776fd2 -re04155c0cc0efa8bbd13e0a82cb8643711a2dfd6
--- Ringtoets/Common/src/Ringtoets.Common.Data/IFailureMechanism.cs	(.../IFailureMechanism.cs)	(revision c6a3cd9e25138d35bf0881f3ff6df9dfe1776fd2)
+++ Ringtoets/Common/src/Ringtoets.Common.Data/IFailureMechanism.cs	(.../IFailureMechanism.cs)	(revision e04155c0cc0efa8bbd13e0a82cb8643711a2dfd6)
@@ -51,7 +51,7 @@
 
         /// <summary>
         /// Gets the sections that define area's for which a calculation could determine
-        /// a representative result.
+        /// a representative result. Cannot return null.
         /// </summary>
         IEnumerable<FailureMechanismSection> Sections { get; }