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
{
		IContent content;
		ArrayList children = new ArrayList();
		BufferNode parent;
		public BufferNode(IContent content, BufferNode parent)
		{
			this.content = content;
			this.parent = parent;
		}
		
		public void addChild(IContent child)
		{
			children.add( child );
		}
	}
	
	public class PageContentBuffer implements IPageBuffer
	{
		public boolean isRepeated( )
		{
			return false;
		}
		public void setRepeated( boolean isRepeated )
		{
		}