method addAttributeDelegates

Source

void addAttributeDelegates(Map<String, String> delegates) {
  element.attributes.forEach((name, value) {
    if (_hasEventPrefix(name)) {
      var start = value.indexOf('{{');
      var end = value.lastIndexOf('}}');
      if (start >= 0 && end >= 0) {
        delegates[_removeEventPrefix(name)] =
            value.substring(start + 2, end).trim();
      }
    }
  });
}