Bug 118750 Insert group for table from library, system throws exception.
Insert group for table from library, system throws exception. Steps: 1.Insert a tabel from library 2.Insert group Actual Results: 1.System throws exception A Birt exception occurred. Plug-in Provider:Eclipse.org Plug-in Name:BIRT Model Plug-in ID:org.eclipse.birt.report.model Version:1.0.1 Error Code:Error.ContentException.STRUCTURE_CHANGE_FORBIDDEN Error Message:Element "report.Body[1]" is child element or a virtual element( inside the child ), can not change its structure. Expected Results: 1.Can be inserted group
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/internal/ui/editors/schematic/actions/InsertGroupActionFactory.java
{
	private static final String STACK_MSG_ADD_GROUP = Messages.getString( "AddGroupAction.stackMsg.addGroup" ); 
	private Object currentModel;
	private List selection;
	protected static final int POSITION_TOP_LEVEL = 0;
	protected static final int POSITION_INNERMOST = -1;
	protected InsertPositionGroupAction( List selection, String text )
	{
		super( );
		this.selection = selection;
		setText( text );
	}
	public void setSelection( List selection )
	{
		this.selection = selection;
		this.currentModel = null;
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.jface.action.Action#isEnabled()
	 */
	public boolean isEnabled( )
	{
		return getTableEditPart( ) != null ^ getListEditPart( ) != null;
	}
	/**
	 * Runs action.
	 *