this.checksumAlgorithmFactorySelector =
                nonNull(checksumAlgorithmFactorySelector, "checksumAlgorithmFactorySelector");
    }

    @Override
    public Collection<String> getChecksumAlgorithmNames() {
        return checksumAlgorithmFactorySelector.getChecksumAlgorithmFactories().stream()
                .map(ChecksumAlgorithmFactory::getName)
                .collect(Collectors.toList());

        this.checksumAlgorithmFactorySelector =
                nonNull(checksumAlgorithmFactorySelector, "checksumAlgorithmFactorySelector");
    }

    @Override
    public Collection<String> getChecksumAlgorithmNames() {
        return checksumAlgorithmFactorySelector.getChecksumAlgorithmFactories().stream()
                .map(ChecksumAlgorithmFactory::getName)
                .collect(Collectors.toList());

        return result;
    }

    private ChecksumAlgorithmFactorySelector checksumAlgorithmFactorySelector;

    public final ChecksumAlgorithmFactorySelector getChecksumAlgorithmFactorySelector() {
        checkClosed();
        if (checksumAlgorithmFactorySelector == null) {
            checksumAlgorithmFactorySelector = createChecksumAlgorithmFactorySelector();
        }