single property
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.
Implementation
T get single => throw new StateError('single');
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.
T get single => throw new StateError('single');