Bug 130094 [regression] cannot edit group in Cheat Sheets
steps to reproduce: - create a report using Grouped Listing template - switch to Cheat Sheets, start/restart the tutorial - follow the steps to 1) create data source; 2) create data set; 3) bind the data to the table; and 4) edit the group expected behavior: - group dialog should be displayed actual behavior: - error message displayed. please refer to the attached image for detail
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/internal/ui/views/DefaultNodeProvider.java
*     Actuate Corporation - Initial implementation.
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package org.eclipse.birt.report.designer.internal.ui.views;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Comparator;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import org.eclipse.birt.report.designer.core.model.SessionHandleAdapter;
import org.eclipse.birt.report.designer.core.model.views.data.DataSetItemModel;
import org.eclipse.birt.report.designer.core.model.views.outline.ReportElementModel;
import org.eclipse.birt.report.designer.internal.ui.dialogs.NewSectionDialog;
import org.eclipse.birt.report.designer.internal.ui.dialogs.TemplateReportItemPropertiesDialog;
import org.eclipse.birt.report.designer.internal.ui.processor.ElementProcessorFactory;
import org.eclipse.birt.report.designer.internal.ui.util.ExceptionHandler;
import org.eclipse.birt.report.designer.internal.ui.views.actions.CopyAction;
import org.eclipse.birt.report.designer.internal.ui.views.actions.CutAction;
import org.eclipse.birt.report.designer.internal.ui.views.actions.DeleteAction;
import org.eclipse.birt.report.designer.internal.ui.views.actions.InsertAction;
import org.eclipse.birt.report.designer.internal.ui.views.actions.InsertInLayoutAction;
import org.eclipse.birt.report.designer.internal.ui.views.actions.PasteAction;
import org.eclipse.birt.report.designer.internal.ui.views.actions.RenameAction;
import org.eclipse.birt.report.designer.nls.Messages;
import org.eclipse.birt.report.designer.ui.ReportPlatformUIImages;
import org.eclipse.birt.report.designer.ui.views.INodeProvider;
import org.eclipse.birt.report.designer.util.DEUtil;
import org.eclipse.birt.report.designer.util.DNDUtil;
import org.eclipse.birt.report.model.api.CellHandle;
import org.eclipse.birt.report.model.api.DesignElementHandle;