Index: Ringtoets/Piping/src/Ringtoets.Piping.Plugin/PipingGuiPlugin.cs
===================================================================
diff -u -r85af6861f16df8c5d57e3e39d0d2874e7bd16b8e -r074232b001ecb5ae110c0b95c05264d4372cbfb5
--- Ringtoets/Piping/src/Ringtoets.Piping.Plugin/PipingGuiPlugin.cs	(.../PipingGuiPlugin.cs)	(revision 85af6861f16df8c5d57e3e39d0d2874e7bd16b8e)
+++ Ringtoets/Piping/src/Ringtoets.Piping.Plugin/PipingGuiPlugin.cs	(.../PipingGuiPlugin.cs)	(revision 074232b001ecb5ae110c0b95c05264d4372cbfb5)
@@ -1,6 +1,7 @@
 using System;
 using System.Collections.Generic;
 using Core.Common.Controls;
+using Core.Common.Controls.Swf.TreeViewControls;
 using Core.Common.Gui;
 using Core.Common.Gui.Forms;
 using Core.Common.Gui.Forms.ProgressDialog;