Index: Core/Gui/src/Core.Gui/Plugin/PluginBase.cs
===================================================================
diff -u -r434415295de74c310ce6d3cdd0100c28838cf9ea -r60ca0bf8a8ced423b04351c29ed2b4522daa50e8
--- Core/Gui/src/Core.Gui/Plugin/PluginBase.cs	(.../PluginBase.cs)	(revision 434415295de74c310ce6d3cdd0100c28838cf9ea)
+++ Core/Gui/src/Core.Gui/Plugin/PluginBase.cs	(.../PluginBase.cs)	(revision 60ca0bf8a8ced423b04351c29ed2b4522daa50e8)
@@ -50,6 +50,14 @@
         public virtual void Deactivate() {}
 
         /// <summary>
+        /// Returns all <see cref="StateInfo"/> instances provided by this plug-in.
+        /// </summary>
+        public virtual IEnumerable<StateInfo> GetStateInfos()
+        {
+            yield break;
+        }
+
+        /// <summary>
         /// Returns all <see cref="ImportInfo"/> instances provided by this plug-in.
         /// </summary>
         public virtual IEnumerable<ImportInfo> GetImportInfos()
Index: Core/Gui/test/Core.Gui.Test/Plugin/PluginBaseTest.cs
===================================================================
diff -u -r781a97409ffc49e5b666a7856f633f46178056df -r60ca0bf8a8ced423b04351c29ed2b4522daa50e8
--- Core/Gui/test/Core.Gui.Test/Plugin/PluginBaseTest.cs	(.../PluginBaseTest.cs)	(revision 781a97409ffc49e5b666a7856f633f46178056df)
+++ Core/Gui/test/Core.Gui.Test/Plugin/PluginBaseTest.cs	(.../PluginBaseTest.cs)	(revision 60ca0bf8a8ced423b04351c29ed2b4522daa50e8)
@@ -93,6 +93,20 @@
         }
 
         [Test]
+        public void GetStateInfos_ReturnsEmpty()
+        {
+            // Setup
+            using (var plugin = new SimplePlugin())
+            {
+                // Call
+                IEnumerable<StateInfo> infos = plugin.GetStateInfos();
+
+                // Assert
+                CollectionAssert.IsEmpty(infos);
+            }
+        }
+
+        [Test]
         public void GetPropertyInfos_ReturnsEmpty()
         {
             // Setup