private void BeginLayer2(IPdfOCG layer)
{
PdfName name = (PdfName)writer.AddSimpleProperty(layer, layer.Ref)[0];
PageResources prs = PageResources;
name = prs.AddProperty(name, layer.Ref);
content.Append("/OC ").Append(name.GetBytes()).Append(" BDC").Append_i(separator);
}