@java.lang.Override
  public int hashCode() {
    if (memoizedHashCode != 0) {
      return memoizedHashCode;
    }
    int hash = 41;
    hash = (19 * hash) + getDescriptor().hashCode();
    hash = (37 * hash) + VERSION_FIELD_NUMBER;
    hash = (53 * hash) + getVersion().hashCode();
    hash = (37 * hash) + STATE_FIELD_NUMBER;
    hash = (53 * hash) + state_;
    if (hasError()) {
      hash = (37 * hash) + ERROR_FIELD_NUMBER;
      hash = (53 * hash) + getError().hashCode();
    }
    if (hasStartTime()) {
      hash = (37 * hash) + START_TIME_FIELD_NUMBER;
      hash = (53 * hash) + getStartTime().hashCode();
    }
    hash = (37 * hash) + PREVIOUS_VERSION_FIELD_NUMBER;
    hash = (53 * hash) + getPreviousVersion().hashCode();
    hash = (29 * hash) + getUnknownFields().hashCode();
    memoizedHashCode = hash;
    return hash;
  }
<pre>
The version from which we upgraded.
</pre>

<code>string previous_version = 5;</code>

@return The bytes for previousVersion.
java-vmmigration/proto-google-cloud-vmmigration-v1/src/main/java/com/google/cloud/vmmigration/v1/UpgradeStatus.java