diff --git a/flow-kit/src/main/java/com/zeoflow/app/RVHolderCore.java b/flow-kit/src/main/java/com/zeoflow/app/RVHolderCore.java
deleted file mode 100644
index 8c0b348..0000000
--- a/flow-kit/src/main/java/com/zeoflow/app/RVHolderCore.java
+++ /dev/null
@@ -1,102 +0,0 @@
-// Copyright 2021 ZeoFlow SRL
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-package com.zeoflow.app;
-
-import android.content.Context;
-import android.content.pm.ApplicationInfo;
-import android.view.View;
-
-import androidx.recyclerview.widget.RecyclerView;
-
-import com.zeoflow.annotation.NonNull;
-import com.zeoflow.annotation.Nullable;
-import com.zeoflow.initializer.ZeoFlowApp;
-import com.zeoflow.log.AndroidLogAdapter;
-import com.zeoflow.log.FormatStrategy;
-import com.zeoflow.log.Log;
-import com.zeoflow.log.PrettyFormatStrategy;
-import com.zeoflow.zson.Zson;
-
-public class RVHolderCore extends RecyclerView.ViewHolder
-{
-
-    public Context zContext = ZeoFlowApp.getContext();
-    private String log_tag = getClass().getSimpleName();
-
-    public RVHolderCore(@NonNull View itemView)
-    {
-        super(itemView);
-    }
-
-    public void withLoggerTag(@NonNull String tag)
-    {
-        log_tag = tag;
-    }
-
-    public void log(@NonNull String message, @Nullable Object... args)
-    {
-
-        boolean isDebuggable = (0 != (zContext.getApplicationInfo().flags & ApplicationInfo.FLAG_DEBUGGABLE));
-        if (!isDebuggable)
-        {
-            return;
-        }
-        FormatStrategy formatStrategy = PrettyFormatStrategy.newBuilder()
-            .showThreadInfo(false)
-            .methodCount(0)
-            .tag(log_tag == null || log_tag.isEmpty() ? this.getClass().getSimpleName() : log_tag)
-            .build();
-        Log.addLogAdapter(new AndroidLogAdapter(formatStrategy));
-
-        Log.d(message, args);
-
-    }
-
-    public void log(Object... objects)
-    {
-
-        boolean isDebuggable = (0 != (zContext.getApplicationInfo().flags & ApplicationInfo.FLAG_DEBUGGABLE));
-        if (!isDebuggable)
-        {
-            return;
-        }
-        FormatStrategy formatStrategy = PrettyFormatStrategy.newBuilder()
-            .showThreadInfo(false)
-            .methodCount(0)
-            .tag(log_tag == null || log_tag.isEmpty() ? this.getClass().getSimpleName() : log_tag)
-            .build();
-        Log.addLogAdapter(new AndroidLogAdapter(formatStrategy));
-
-        for (Object object : objects)
-        {
-            Log.json(new Zson().toJson(object));
-        }
-    }
-
-    public int zPosition = getPos();
-
-    private int getPos()
-    {
-        return getLayoutPosition();
-    }
-
-    public int zViewType = getViewType();
-
-    private int getViewType()
-    {
-        return getItemViewType();
-    }
-
-}