Index: Ringtoets/Integration/src/Ringtoets.Integration.Plugin/Merge/AssessmentSectionMergeHandler.cs
===================================================================
diff -u -r4c958ce7ec9ae0247146de8bf83b5495a6ac2ec0 -r7c6b0a809f0c14f6192e9518a92192bf59aafd15
--- Ringtoets/Integration/src/Ringtoets.Integration.Plugin/Merge/AssessmentSectionMergeHandler.cs	(.../AssessmentSectionMergeHandler.cs)	(revision 4c958ce7ec9ae0247146de8bf83b5495a6ac2ec0)
+++ Ringtoets/Integration/src/Ringtoets.Integration.Plugin/Merge/AssessmentSectionMergeHandler.cs	(.../AssessmentSectionMergeHandler.cs)	(revision 7c6b0a809f0c14f6192e9518a92192bf59aafd15)
@@ -37,6 +37,7 @@
 using Ringtoets.GrassCoverErosionOutwards.Data;
 using Ringtoets.HeightStructures.Data;
 using Ringtoets.Integration.Data;
+using Ringtoets.Integration.Data.Merge;
 using Ringtoets.Integration.Data.StandAlone;
 using Ringtoets.Integration.Plugin.Properties;
 using Ringtoets.MacroStabilityInwards.Data;
@@ -105,6 +106,16 @@
             AfterMerge(changedObjects);
         }
 
+        public void PerformMerge(AssessmentSection targetAssessmentSection, AssessmentSectionMergeData mergeData)
+        {
+            if (mergeData == null)
+            {
+                throw new ArgumentNullException(nameof(mergeData));
+            }
+
+            PerformMerge(targetAssessmentSection, mergeData.AssessmentSection, mergeData.FailureMechanisms);
+        }
+
         private void BeforeMerge(AssessmentSection assessmentSection)
         {
             viewCommands.RemoveAllViewsForItem(assessmentSection);