single property

  1. @override
E get single
override

Checks that this iterable has only one element, and returns that element.

Throws a StateError if this is empty or has more than one element. This operation will not iterate past the second element.

Implementation

@override
E get single {
  try {
    return _elements.single;
  } on StateError catch (e) {
    throw NoGuaranteeException('Queue is empty', cause: e);
  }
}