Nelmio\Alice\Generator\Resolver\Value\Chainable\UnresolvedFixtureReferenceIdResolver::getReferredFixtureId PHP Method

    private function getReferredFixtureId(ValueResolverInterface $resolver, ValueInterface $value, FixtureInterface $fixture, ResolvedFixtureSet $set, array $scope, GenerationContext $context) : array
    {
        $referredFixtureId = $value->getValue();
        if ($referredFixtureId instanceof ValueInterface) {
            $resolvedSet = $resolver->resolve($referredFixtureId, $fixture, $set, $scope, $context);
            list($referredFixtureId, $set) = [$resolvedSet->getValue(), $resolvedSet->getSet()];
            if (false === is_string($referredFixtureId)) {
                throw UnresolvableValueExceptionFactory::createForInvalidReferenceId($value, $referredFixtureId);
            }
        }
        return [$referredFixtureId, $set];
    }