Bug 161186 Effects in viewer and PDF are not the same
engine/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/layout/pdf/PDFAbstractLM.java
return pageDesign;
		}
		return null;
	}
	protected boolean handleVisibility( )
	{
		if ( isHidden( ) )
		{
			traverse( executor );
			return true;
		}
		else
		{
			return false;
		}
	}
	private void traverse( IReportItemExecutor executor )
	{
		if ( executor != null )
		{
			while ( executor.hasNextChild( ) )
			{
				IReportItemExecutor child = (IReportItemExecutor) executor
						.getNextChild( );
				if ( child != null )
				{
					child.execute( );
					traverse( child );
					child.close( );
				}