@java.lang.Override
  public int hashCode() {
    if (memoizedHashCode != 0) {
      return memoizedHashCode;
    }
    int hash = 41;
    hash = (19 * hash) + getDescriptor().hashCode();
    if (hasStartTime()) {
      hash = (37 * hash) + START_TIME_FIELD_NUMBER;
      hash = (53 * hash) + getStartTime().hashCode();
    }
    if (hasLastUpdateTime()) {
      hash = (37 * hash) + LAST_UPDATE_TIME_FIELD_NUMBER;
      hash = (53 * hash) + getLastUpdateTime().hashCode();
    }
    hash = (37 * hash) + PROGRESS_PERCENTAGE_FIELD_NUMBER;
    hash =
        (53 * hash)
            + com.google.protobuf.Internal.hashLong(
                java.lang.Double.doubleToLongBits(getProgressPercentage()));
    hash = (29 * hash) + getUnknownFields().hashCode();
    memoizedHashCode = hash;
    return hash;
  }
<pre>
The progress of the most recent processing update in percentage, ie. 70.0%.
</pre>

<code>double progress_percentage = 3;</code>

@return The progressPercentage.
java-texttospeech/proto-google-cloud-texttospeech-v1beta1/src/main/java/com/google/cloud/texttospeech/v1beta1/SynthesizeLongAudioMetadata.java