TableRenderer tableRenderer = dgm.getTableRenderer();
assert tableRenderer != null;
if(dgm.isRenderRowGroups()) {
_theadTag.styleClass = (_theadTag.styleClass != null ? _theadTag.styleClass : styleModel.getTableHeadClass());
tableRenderer.openTableHead(_theadTag, appender);
}
TrTag.State trState = null;
if(_renderRow) {
trState = new TrTag.State();