if (cssIndex < 0) {
forcedStyleIdentifier = "s" + (maxIndex + 1);
Element css = Documents.createElement(doc, isdStyleElementName);
Documents.setAttribute(css, TTML1StyleVerifier.visibilityAttributeName, "visible");
Documents.setAttribute(css, XML.xmlIdentifierAttributeName, forcedStyleIdentifier);
<BUG>Documents.setAttribute(css, TTML2Helper.conditionAttributeName, forcedParameterCondition);
if (!regions.isEmpty()) {</BUG>
Element firstRegion = regions.get(0);
assert firstRegion != null;
Element isdParent = (Element) firstRegion.getParentNode();

if (cssIndex < 0) {
forcedStyleIdentifier = "s" + (maxIndex + 1);
Element css = Documents.createElement(doc, isdStyleElementName);
Documents.setAttribute(css, TTML1StyleVerifier.visibilityAttributeName, "visible");
Documents.setAttribute(css, XML.xmlIdentifierAttributeName, forcedStyleIdentifier);
Documents.setAttribute(css, conditionAttributeName, forcedParameterCondition);
if (!regions.isEmpty()) {
Element firstRegion = regions.get(0);
assert firstRegion != null;
Element isdParent = (Element) firstRegion.getParentNode();
