@java.lang.Override
  public int hashCode() {
    if (memoizedHashCode != 0) {
      return memoizedHashCode;
    }
    int hash = 41;
    hash = (19 * hash) + getDescriptor().hashCode();
    hash = (37 * hash) + EVENT_MESSAGE_FIELD_NUMBER;
    hash = (53 * hash) + getEventMessage().hashCode();
    if (hasPayload()) {
      hash = (37 * hash) + PAYLOAD_FIELD_NUMBER;
      hash = (53 * hash) + getPayload().hashCode();
    }
    hash = (37 * hash) + EVENT_ID_FIELD_NUMBER;
    hash = (53 * hash) + getEventId().hashCode();
    hash = (29 * hash) + getUnknownFields().hashCode();
    memoizedHashCode = hash;
    return hash;
  }
<pre>
User defined Event Id, used to classify event, within a delivery interval,
events from the same application instance with the same id will be
de-duplicated &amp; only first one will be sent out. Empty event_id will be
treated as "".
</pre>

<code>string event_id = 3;</code>

@return The bytes for eventId.
java-visionai/proto-google-cloud-visionai-v1/src/main/java/com/google/cloud/visionai/v1/AppPlatformEventBody.java