Index: Ringtoets/Piping/src/Ringtoets.Piping.Forms/Views/PipingFailureMechanismView.cs
===================================================================
diff -u -r66b07e7599319ea71ff109d8303f74a4a2e5f71c -rc290911dd4647e3115e239c8baf814717c098a5a
--- Ringtoets/Piping/src/Ringtoets.Piping.Forms/Views/PipingFailureMechanismView.cs	(.../PipingFailureMechanismView.cs)	(revision 66b07e7599319ea71ff109d8303f74a4a2e5f71c)
+++ Ringtoets/Piping/src/Ringtoets.Piping.Forms/Views/PipingFailureMechanismView.cs	(.../PipingFailureMechanismView.cs)	(revision c290911dd4647e3115e239c8baf814717c098a5a)
@@ -32,7 +32,6 @@
 using Ringtoets.Common.Forms.Views;
 using Ringtoets.Piping.Data;
 using Ringtoets.Piping.Forms.PresentationObjects;
-using Ringtoets.Piping.Primitives;
 using PipingDataResources = Ringtoets.Piping.Data.Properties.Resources;
 
 namespace Ringtoets.Piping.Forms.Views
@@ -197,8 +196,8 @@
         {
             ReferenceLine referenceLine = data.Parent.ReferenceLine;
             IEnumerable<FailureMechanismSection> failureMechanismSections = data.WrappedData.Sections;
-            ObservableUniqueItemCollectionWithSourcePath<StochasticSoilModel> stochasticSoilModels = data.WrappedData.StochasticSoilModels;
-            ObservableUniqueItemCollectionWithSourcePath<RingtoetsPipingSurfaceLine> ringtoetsPipingSurfaceLines = data.WrappedData.SurfaceLines;
+            StochasticSoilModelCollection stochasticSoilModels = data.WrappedData.StochasticSoilModels;
+            RingtoetsPipingSurfaceLineCollection ringtoetsPipingSurfaceLines = data.WrappedData.SurfaceLines;
             HydraulicBoundaryDatabase hydraulicBoundaryDatabase = data.Parent.HydraulicBoundaryDatabase;
             IEnumerable<PipingCalculationScenario> calculations =
                 data.WrappedData.CalculationsGroup.GetCalculations().Cast<PipingCalculationScenario>();