Read the class names from the Element class property, and put them into a set (duplicates are discarded). This is intended to be overridden by specific implementations.
Source
Set<String> readClasses() {
var classname = _element.attributes['class'];
if (classname is AnimatedString) {
classname = (classname as AnimatedString).baseVal;
}
Set<String> s = new LinkedHashSet<String>();
if (classname == null) {
return s;
}
for (String name in classname.split(' ')) {
String trimmed = name.trim();
if (!trimmed.isEmpty) {
s.add(trimmed);
}
}
return s;
}