forEmptyDataset example

// Restore $cleanValidationRules         $this->cleanValidationRules = $cleanValidationRules;

        // Must be called first, so we don't         // strip out created_at values.         $data = $this->doProtectFieldsForInsert($data);

        // doProtectFields() can further remove elements from         // $data so we need to check for empty dataset again         if (! $this->allowEmptyInserts && empty($data)) {
            throw DataException::forEmptyDataset('insert');
        }

        // Set created_at and updated_at with same time         $date = $this->setDate();

        if ($this->useTimestamps && $this->createdField && ! array_key_exists($this->createdField, $data)) {
            $data[$this->createdField] = $date;
        }

        if ($this->useTimestamps && $this->updatedField && ! array_key_exists($this->updatedField, $data)) {
            $data[$this->updatedField] = $date;
        }

    public function chunk(int $size, Closure $userFunc)
    {
        $total  = $this->builder()->countAllResults(false);
        $offset = 0;

        while ($offset <= $total) {
            $builder = clone $this->builder();
            $rows    = $builder->get($size, $offset);

            if (! $rows) {
                throw DataException::forEmptyDataset('chunk');
            }

            $rows = $rows->getResult($this->tempReturnType);

            $offset += $size;

            if (empty($rows)) {
                continue;
            }

            foreach ($rows as $row) {