Bug 191005 PDF preview hangs up with attached xtab.[1102]
engine/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/layout/pdf/PDFTableRegionLM.java
implements
			IBlockStackingLayoutManager
{
	protected int groupLevel = 0;
	
	public PDFTableRegionLM( PDFLayoutEngineContext context, IContent content,
			TableLayoutInfo layoutInfo, TableAreaLayout regionLayout )
	{
		super( context, null, content, null );
		this.layoutInfo = layoutInfo;
		this.layout = regionLayout;
	}
	
	protected int getGroupLevel()
	{
		return groupLevel;
	}
	public void setGroupLevel(int groupLevel)
	{
		this.groupLevel = groupLevel;
	}
	
	public void initialize( ITableBandContent content )
	{
		this.executor = new DOMReportItemExecutor( content );
		this.executor.execute( );
		status = STATUS_START;
	}
	
	protected void initialize()