Index: Ringtoets/Piping/src/Ringtoets.Piping.Forms/PropertyClasses/PipingCalculationGroupContextProperties.cs
===================================================================
diff -u -rfbb37872d09f1ded75ce2209e8e48a6b64d8a78f -r0c64d8a6c718c0aa67403a16c94dd0c10f862455
--- Ringtoets/Piping/src/Ringtoets.Piping.Forms/PropertyClasses/PipingCalculationGroupContextProperties.cs	(.../PipingCalculationGroupContextProperties.cs)	(revision fbb37872d09f1ded75ce2209e8e48a6b64d8a78f)
+++ Ringtoets/Piping/src/Ringtoets.Piping.Forms/PropertyClasses/PipingCalculationGroupContextProperties.cs	(.../PipingCalculationGroupContextProperties.cs)	(revision 0c64d8a6c718c0aa67403a16c94dd0c10f862455)
@@ -21,6 +21,7 @@
 
 using Core.Common.Gui;
 using Core.Common.Gui.Attributes;
+using Core.Common.Gui.PropertyBag;
 using Core.Common.Utils.Attributes;
 
 using Ringtoets.Piping.Data;