public SectionBuilder GetSectionBuilder(string sectionName)
{
var section = _sectionBuilders.FirstOrDefault(x => x.Header.Name == sectionName);
if (section == null)
{
_sectionBuilders.Add(section = new SectionBuilder(_builder, sectionName));
_headerBuilder.Segments.Add(section.Header);
_contentBuilder.Segments.Add(section);
}
return section;
}