Bug 152560 PDF doesn't display bottom Border in inner group footer properly
engine/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/layout/pdf/PDFTableLM.java
{
		IRowContent row;
		int rowID;
		public RowWrapper( IRowContent row, int rowID )
		{
			this.row = row;
			this.rowID = rowID;
		}
	}
	protected IReportItemExecutor createExecutor( )
	{
		return executor;
	}
	protected boolean isRootEmpty( )
	{
		return !( root != null && root.getChildrenCount( ) > repeatRowCount );
	}
}