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
public void endContainer( IContent content, boolean finished,
				IContentEmitter emitter, boolean visible )
		{
			if(content!=null && visible)
			{
				ContentEmitterUtil.endContent( pageContent, emitter );
			}
		}
		public void startContainer( IContent content, boolean isFirst,
				IContentEmitter emitter, boolean visible )
		{
			if(content!=null && visible)
			{
				ContentEmitterUtil.startContent( content, emitter );
			}
			
		}
		public void startContent( IContent content, IContentEmitter emitter,
				boolean visible )
		{
			if(content!=null && visible)
			{
				ContentEmitterUtil.startContent( content, emitter );
				ContentEmitterUtil.endContent( content, emitter );
			}
			
		}
	}
}