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 {
  if (_size != 1) {
    throw IllegalStateException('Expected single element, but got $_size');
  }
  return first;
}