private function validateRowInProgress(CellChunk $chunk)
    {
        $this->validateResetRow($chunk);
        $newRowKey = $chunk->getRowKey();
        $this->isError(
            $chunk->getRowKey() && $newRowKey !== $this->rowKey,
            'A commit is required between row keys.'
        );
        $this->isError(
            $chunk->getFamilyName() && !$chunk->getQualifier(),
            'A qualifier must be specified.'
        );
        $this->validateValueSizeAndCommitRow($chunk);
    }