Source:
<code>public Mono<EventDataBatch> createBatch(CreateBatchOptions options) { if (options == null) { return monoError(logger, new NullPointerException("'options' cannot be null.")); } if (this.isIdempotentPartitionPublishing) { <START> if (CoreUtils.isNullOrEmpty(options.getPartitionId())) { <END> return monoError(logger, new IllegalArgumentException( "An idempotent producer can not create an EventDataBatch without partition id")); } } final String partitionKey = options.getPartitionKey(); final String partitionId = options.getPartitionId(); final int batchMaxSize = options.getMaximumSizeInBytes(); if (!CoreUtils.isNullOrEmpty(partitionKey) && !CoreUtils.isNullOrEmpty(partitionId)) { return monoError(logger, new IllegalArgumentException(String.format(Locale.US, "CreateBatchOptions.getPartitionKey() and CreateBatchOptions.getPartitionId() are both set. " + "Only one or the other can be used. partitionKey: '%s'. partitionId: '%s'", partitionKey, partitionId))); } else if (!CoreUtils.isNullOrEmpty(partitionKey) && partitionKey.length() > MAX_PARTITION_KEY_LENGTH) { return monoError(logger, new IllegalArgumentException(String.format(Locale.US, "Partition key '%s' exceeds the maximum allowed length: '%s'.", partitionKey, MAX_PARTITION_KEY_LENGTH))); } return getSendLink(partitionId) .flatMap(link -> link.getLinkSize() .flatMap(size -> { final int maximumLinkSize = size > 0 ? size : MAX_MESSAGE_LENGTH_BYTES; if (batchMaxSize > maximumLinkSize) { return monoError(logger, new IllegalArgumentException(String.format(Locale.US, "BatchOptions.maximumSizeInBytes (%s bytes) is larger than the link size (%s bytes).", batchMaxSize, maximumLinkSize))); } final int batchSize = batchMaxSize > 0 ? batchMaxSize : maximumLinkSize; return Mono.just(new EventDataBatch(batchSize, partitionId, partitionKey, link::getErrorContext, tracerProvider, link.getEntityPath(), link.getHostname(), this.isIdempotentPartitionPublishing)); })); }</code><technical_language>flatten this &&</technical_language>

Target:
public Mono<EventDataBatch> createBatch(CreateBatchOptions options) { if (options == null) { return monoError(logger, new NullPointerException("'options' cannot be null.")); } if (isIdempotentPartitionPublishing && CoreUtils.isNullOrEmpty(options.getPartitionId())) { return monoError(logger, new IllegalArgumentException( "An idempotent producer can not create an EventDataBatch without partition id")); } final String partitionKey = options.getPartitionKey(); final String partitionId = options.getPartitionId(); final int batchMaxSize = options.getMaximumSizeInBytes(); if (!CoreUtils.isNullOrEmpty(partitionKey) && !CoreUtils.isNullOrEmpty(partitionId)) { return monoError(logger, new IllegalArgumentException(String.format(Locale.US, "CreateBatchOptions.getPartitionKey() and CreateBatchOptions.getPartitionId() are both set. " + "Only one or the other can be used. partitionKey: '%s'. partitionId: '%s'", partitionKey, partitionId))); } else if (!CoreUtils.isNullOrEmpty(partitionKey) && partitionKey.length() > MAX_PARTITION_KEY_LENGTH) { return monoError(logger, new IllegalArgumentException(String.format(Locale.US, "Partition key '%s' exceeds the maximum allowed length: '%s'.", partitionKey, MAX_PARTITION_KEY_LENGTH))); } return getSendLink(partitionId) .flatMap(link -> link.getLinkSize() .flatMap(size -> { final int maximumLinkSize = size > 0 ? size : MAX_MESSAGE_LENGTH_BYTES; if (batchMaxSize > maximumLinkSize) { return monoError(logger, new IllegalArgumentException(String.format(Locale.US, "BatchOptions.maximumSizeInBytes (%s bytes) is larger than the link size (%s bytes).", batchMaxSize, maximumLinkSize))); } final int batchSize = batchMaxSize > 0 ? batchMaxSize : maximumLinkSize; return Mono.just(new EventDataBatch(batchSize, partitionId, partitionKey, link::getErrorContext, tracerProvider, link.getEntityPath(), link.getHostname(), isIdempotentPartitionPublishing)); })); }