@java.lang.Override
  public int hashCode() {
    if (memoizedHashCode != 0) {
      return memoizedHashCode;
    }
    int hash = 41;
    hash = (19 * hash) + getDescriptor().hashCode();
    hash = (37 * hash) + CORPUS_FIELD_NUMBER;
    hash = (53 * hash) + getCorpus().hashCode();
    hash = (37 * hash) + REGION_FIELD_NUMBER;
    hash = (53 * hash) + getRegion().hashCode();
    if (hasTtl()) {
      hash = (37 * hash) + TTL_FIELD_NUMBER;
      hash = (53 * hash) + getTtl().hashCode();
    }
    hash = (29 * hash) + getUnknownFields().hashCode();
    memoizedHashCode = hash;
    return hash;
  }
<pre>
The duration for which all media assets, associated metadata, and search
documents can exist.
</pre>

<code>.google.protobuf.Duration ttl = 3;</code>
java-visionai/proto-google-cloud-visionai-v1/src/main/java/com/google/cloud/visionai/v1/MediaWarehouseConfig.java