getAttribute method Null safety

String? getAttribute (
  1. String name
)

Implementation

@pragma('dart2js:tryInline')
String? getAttribute(String name) {
  // TODO(41258): Delete this assertion after forcing strong mode.
  // Protect [name] against string conversion to "null" or "undefined".
  assert(name != null, 'Attribute name cannot be null');
  return _getAttribute(name);
}