diff --git a/Svelto.ECS/Extensions/Unity/UnityEntityDescriptorHolder.cs b/Svelto.ECS/Extensions/Unity/GenericEntityDescriptorHolder.cs
similarity index 78%
rename from Svelto.ECS/Extensions/Unity/UnityEntityDescriptorHolder.cs
rename to Svelto.ECS/Extensions/Unity/GenericEntityDescriptorHolder.cs
index d6156b6..35692bc 100644
--- a/Svelto.ECS/Extensions/Unity/UnityEntityDescriptorHolder.cs
+++ b/Svelto.ECS/Extensions/Unity/GenericEntityDescriptorHolder.cs
@@ -1,7 +1,7 @@
 #if UNITY_5 || UNITY_5_3_OR_NEWER
-namespace Svelto.ECS
+namespace Svelto.ECS.Unity
 {
-    public class UnityEntityDescriptorHolder<T>: 
+    public class GenericEntityDescriptorHolder<T>: 
         UnityEngine.MonoBehaviour , IEntityDescriptorHolder
             where T: IEntityDescriptor, new()
     {
diff --git a/Svelto.ECS/Sequencer.cs b/Svelto.ECS/Sequencer.cs
index 83c0878..154002e 100644
--- a/Svelto.ECS/Sequencer.cs
+++ b/Svelto.ECS/Sequencer.cs
@@ -40,14 +40,7 @@ namespace Svelto.ECS
         void Step(ref T token, Enum condition);
     }
     
-    public interface ISequencer
-    {
-        void Next<T>(IEngine engine, ref T param);
-        void Next<T>(IEngine engine, ref T param, int condition);
-        void Next<T, C>(IEngine engine, ref T param, C condition) where C : struct, IConvertible;
-    }
-
-    public abstract class Sequencer : ISequencer
+    public abstract class Sequencer
     {
         public void SetSequence(Steps steps)       
         {