protected function addIntegerList(
        EntityInterface $entity,
        AttributeInterface $attribute,
        array $options = array()
    ) {
        $values = array();

        $number_of_values = $this->faker->numberBetween(1, 5);
        for ($i = 0; $i < $number_of_values; $i++) {
            $values[] = $this->faker->randomNumber(5);
        }

        $this->setValue($entity, $attribute, $values, $options);
    }