public function setCreatedColumn($createdColumn)
    {
        $createdColumn = (string) $createdColumn;

        /** @noinspection IsEmptyFunctionUsageInspection */
        if (empty($createdColumn)) {
            throw new Exception\InvalidArgumentException('Created column must be a non-empty string.');
        }

        $this->createdColumn = $createdColumn;

        return $this;
    }