Index: Application/Ringtoets/src/Application.Ringtoets.Storage/Create/Piping/PipingSoilLayerCreateExtensions.cs
===================================================================
diff -u -r1a062846c75d2d86454dc052adc7a5993b79963e -r7ae9100ff4e61169edcefaeb01b72d492431742f
--- Application/Ringtoets/src/Application.Ringtoets.Storage/Create/Piping/PipingSoilLayerCreateExtensions.cs	(.../PipingSoilLayerCreateExtensions.cs)	(revision 1a062846c75d2d86454dc052adc7a5993b79963e)
+++ Application/Ringtoets/src/Application.Ringtoets.Storage/Create/Piping/PipingSoilLayerCreateExtensions.cs	(.../PipingSoilLayerCreateExtensions.cs)	(revision 7ae9100ff4e61169edcefaeb01b72d492431742f)
@@ -35,17 +35,10 @@
         /// Creates a <see cref="SoilLayerEntity"/> based on the information of the <see cref="PipingSoilLayer"/>.
         /// </summary>
         /// <param name="layer">The layer to create a database entity for.</param>
-        /// <param name="registry">The object keeping track of create operations.</param>
         /// <param name="order">Index at which this instance resides inside its parent container.</param>
         /// <returns>A new <see cref="SoilLayerEntity"/>.</returns>
-        /// <exception cref="ArgumentNullException">Thrown when <paramref name="registry"/> is <c>null</c>.</exception>
-        internal static SoilLayerEntity Create(this PipingSoilLayer layer, PersistenceRegistry registry, int order)
+        internal static SoilLayerEntity Create(this PipingSoilLayer layer, int order)
         {
-            if (registry == null)
-            {
-                throw new ArgumentNullException("registry");
-            }
-
             var entity = new SoilLayerEntity
             {
                 IsAquifer = Convert.ToByte(layer.IsAquifer),