diff --git a/src/com/fr/plugin/demo/DemoChart.java b/src/com/fr/plugin/demo/DemoChart.java
index a4315ed..f06a0ae 100644
--- a/src/com/fr/plugin/demo/DemoChart.java
+++ b/src/com/fr/plugin/demo/DemoChart.java
@@ -6,6 +6,7 @@ import com.fr.extended.chart.ExtendedHelper;
 import com.fr.extended.chart.HyperLinkPara;
 import com.fr.extended.chart.export.ExportProcessor;
 import com.fr.extended.chart.export.JSExportProcessor;
+import com.fr.general.ComparatorUtils;
 import com.fr.general.GeneralUtils;
 import com.fr.json.JSON;
 import com.fr.json.JSONArray;
@@ -52,6 +53,21 @@ public class DemoChart extends AbstractChart<DemoDataConfig>{
         ExtendedHelper.writeFormula(this.getTitleFormula(), writer, "title");
     }
 
+    @Override
+    public Object clone() throws CloneNotSupportedException {
+        DemoChart result = (DemoChart) super.clone();
+        result.setTitleFormula(this.getTitleFormula().clone());
+        return result;
+    }
+
+    @Override
+    public boolean equals(Object ob) {
+        return super.equals(ob)
+                && ob instanceof DemoChart
+                && ComparatorUtils.equals(this.getTitleFormula(), ((DemoChart) ob).getTitleFormula())
+                ;
+    }
+
     @Override
     protected String getChartID() {
         return ID;
diff --git a/src/com/fr/plugin/demo/DemoDataConfig.java b/src/com/fr/plugin/demo/DemoDataConfig.java
index 7cc68e1..9f2c5d9 100644
--- a/src/com/fr/plugin/demo/DemoDataConfig.java
+++ b/src/com/fr/plugin/demo/DemoDataConfig.java
@@ -2,6 +2,7 @@ package com.fr.plugin.demo;
 
 import com.fr.extended.chart.AbstractDataConfig;
 import com.fr.extended.chart.ExtendedField;
+import com.fr.general.ComparatorUtils;
 import com.fr.stable.xml.XMLPrintWriter;
 import com.fr.stable.xml.XMLableReader;
 
@@ -60,4 +61,22 @@ public class DemoDataConfig extends AbstractDataConfig {
                 z
         };
     }
+
+    @Override
+    public DemoDataConfig clone() throws CloneNotSupportedException {
+        DemoDataConfig result = new DemoDataConfig();
+        result.setX(this.getX().clone());
+        result.setY(this.getY().clone());
+        result.setZ(this.getZ().clone());
+        return result;
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        return obj instanceof DemoDataConfig
+                && ComparatorUtils.equals(this.getX(), ((DemoDataConfig) obj).getX())
+                && ComparatorUtils.equals(this.getY(), ((DemoDataConfig) obj).getY())
+                && ComparatorUtils.equals(this.getZ(), ((DemoDataConfig) obj).getZ())
+                ;
+    }
 }