Bug 211991 Page header items when in a grid within a grid disappear on runtime render
engine/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/layout/html/HTMLPageLM.java
protected void start( boolean isFirst )
	{
		MasterPageDesign pageDesign = getMasterPage( report );
		pageContent = ReportExecutorUtil.executeMasterPage( reportExecutor,
				context.getPageNumber( ), pageDesign );
		if ( pageContent != null && context.needLayoutPageContent( ) )
		{
			layoutPageContent( pageContent );
		}
		if ( emitter != null )
		{
			context.getPageBufferManager( ).startContainer( pageContent,
					isFirst, emitter, true );
		}
	}
	
	protected IContent getContent()
	{
		return pageContent;
	}
	protected void end( boolean finished )
	{
		if ( emitter != null  )
		{
			context.getPageBufferManager( ).endContainer( pageContent, finished, emitter, true );
		}
	}
	
	public class ContentDOMEmitter extends ContentEmitterAdapter