diff --git a/src/main/java/org/gcube/portlets/user/td/extractcodelistwidget/client/TargetColumnsSelectionPanel.java b/src/main/java/org/gcube/portlets/user/td/extractcodelistwidget/client/TargetColumnsSelectionPanel.java
index 90d85bb..f79010b 100644
--- a/src/main/java/org/gcube/portlets/user/td/extractcodelistwidget/client/TargetColumnsSelectionPanel.java
+++ b/src/main/java/org/gcube/portlets/user/td/extractcodelistwidget/client/TargetColumnsSelectionPanel.java
@@ -4,14 +4,12 @@ import java.util.ArrayList;
 
 import org.gcube.portlets.user.td.columnwidget.client.dimension.CodelistSelectionDialog;
 import org.gcube.portlets.user.td.columnwidget.client.dimension.CodelistSelectionListener;
-import org.gcube.portlets.user.td.columnwidget.client.dimension.DimensionRowSelectionDialog;
 import org.gcube.portlets.user.td.columnwidget.client.properties.ColumnDataPropertiesCombo;
 import org.gcube.portlets.user.td.columnwidget.client.properties.ExtractCodelistDefColumnPropertiesCombo;
 import org.gcube.portlets.user.td.columnwidget.client.resources.ResourceBundle;
 import org.gcube.portlets.user.td.columnwidget.client.utils.UtilsGXT3;
 import org.gcube.portlets.user.td.gwtservice.client.rpc.TDGWTServiceAsync;
 import org.gcube.portlets.user.td.gwtservice.shared.exception.TDGWTSessionExpiredException;
-
 import org.gcube.portlets.user.td.gwtservice.shared.extract.ExtractCodelistTargetColumn;
 import org.gcube.portlets.user.td.gwtservice.shared.tr.ColumnData;
 import org.gcube.portlets.user.td.gwtservice.shared.tr.DefNewColumn;
@@ -34,8 +32,8 @@ import com.sencha.gxt.widget.core.client.container.SimpleContainer;
 import com.sencha.gxt.widget.core.client.container.VerticalLayoutContainer;
 import com.sencha.gxt.widget.core.client.container.VerticalLayoutContainer.VerticalLayoutData;
 import com.sencha.gxt.widget.core.client.event.SelectEvent;
-import com.sencha.gxt.widget.core.client.event.TriggerClickEvent;
 import com.sencha.gxt.widget.core.client.event.SelectEvent.SelectHandler;
+import com.sencha.gxt.widget.core.client.event.TriggerClickEvent;
 import com.sencha.gxt.widget.core.client.event.TriggerClickEvent.TriggerClickHandler;
 import com.sencha.gxt.widget.core.client.form.ComboBox;
 import com.sencha.gxt.widget.core.client.form.FieldLabel;