/**
   * The offset commit behavior enumeration.
   */
  public enum AckMode {
    /**
     * Commit after each record is processed by the listener.
     */
    RECORD,
    /**
     * Commit whatever has already been processed before the next poll.
     */
    BATCH,
    /**
     * Commit pending updates after
     * {@link ContainerProperties#setAckTime(long) ackTime} has elapsed.
     */
    TIME,
    /**
     * Commit pending updates after
     * {@link ContainerProperties#setAckCount(int) ackCount} has been
     * exceeded.
     */
    COUNT,
    /**
     * Commit pending updates after
     * {@link ContainerProperties#setAckCount(int) ackCount} has been
     * exceeded or after {@link ContainerProperties#setAckTime(long)
     * ackTime} has elapsed.
     */
    COUNT_TIME,
    /**
     * User takes responsibility for acks using an
     * {@link AcknowledgingMessageListener}.
     */
    MANUAL,
    /**
     * User takes responsibility for acks using an
     * {@link AcknowledgingMessageListener}. The consumer
     * immediately processes the commit.
     */
    MANUAL_IMMEDIATE,
  }