Bug 206603 Table column is not rendered in pdf if its width is set in ems
engine/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/layout/pdf/PDFAbstractLM.java
{
			while ( executor.hasNextChild( ) )
			{
				IReportItemExecutor childExecutor = executor.getNextChild( );
				if ( childExecutor != null )
				{
					IContent childContent = childExecutor.execute( );
					content.getChildren( ).add( childContent );
					execute( childExecutor, childContent );
					childExecutor.close( );
				}
			}
		}
	}
	protected class ReportStackingExecutor extends ReportItemExecutorBase
	{
		IReportExecutor executor;
		public ReportStackingExecutor( IReportExecutor executor )
		{
			this.executor = executor;
		}
		public void close( )
		{
			executor.close( );
		}
		public IContent execute( )
		{
			return null;
		}
		public IReportItemExecutor getNextChild( )