sdk/greengrass/greengrass-client/src/event-stream-rpc-java/model/software/amazon/awssdk/aws/greengrass/model/MQTTMessage.java [42:88]:
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  @Expose(
      serialize = true,
      deserialize = true
  )
  private Optional<byte[]> payload;

  @Expose(
      serialize = true,
      deserialize = true
  )
  private Optional<Boolean> retain;

  @Expose(
      serialize = true,
      deserialize = true
  )
  private Optional<List<UserProperty>> userProperties;

  @Expose(
      serialize = true,
      deserialize = true
  )
  private Optional<Long> messageExpiryIntervalSeconds;

  @Expose(
      serialize = true,
      deserialize = true
  )
  private Optional<byte[]> correlationData;

  @Expose(
      serialize = true,
      deserialize = true
  )
  private Optional<String> responseTopic;

  @Expose(
      serialize = true,
      deserialize = true
  )
  private Optional<String> payloadFormat;

  @Expose(
      serialize = true,
      deserialize = true
  )
  private Optional<String> contentType;
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sdk/greengrass/greengrass-client/src/event-stream-rpc-java/model/software/amazon/awssdk/aws/greengrass/model/PublishToIoTCoreRequest.java [48:94]:
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  @Expose(
      serialize = true,
      deserialize = true
  )
  private Optional<byte[]> payload;

  @Expose(
      serialize = true,
      deserialize = true
  )
  private Optional<Boolean> retain;

  @Expose(
      serialize = true,
      deserialize = true
  )
  private Optional<List<UserProperty>> userProperties;

  @Expose(
      serialize = true,
      deserialize = true
  )
  private Optional<Long> messageExpiryIntervalSeconds;

  @Expose(
      serialize = true,
      deserialize = true
  )
  private Optional<byte[]> correlationData;

  @Expose(
      serialize = true,
      deserialize = true
  )
  private Optional<String> responseTopic;

  @Expose(
      serialize = true,
      deserialize = true
  )
  private Optional<String> payloadFormat;

  @Expose(
      serialize = true,
      deserialize = true
  )
  private Optional<String> contentType;
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