@java.lang.Override
  public int hashCode() {
    if (memoizedHashCode != 0) {
      return memoizedHashCode;
    }
    int hash = 41;
    hash = (19 * hash) + getDescriptor().hashCode();
    switch (inputSourceCase_) {
      case 1:
        hash = (37 * hash) + TEXT_FIELD_NUMBER;
        hash = (53 * hash) + getText().hashCode();
        break;
      case 5:
        hash = (37 * hash) + MARKUP_FIELD_NUMBER;
        hash = (53 * hash) + getMarkup().hashCode();
        break;
      case 0:
      default:
    }
    hash = (29 * hash) + getUnknownFields().hashCode();
    memoizedHashCode = hash;
    return hash;
  }
<pre>
Markup for HD voices specifically. This field may not be used with any
other voices.
</pre>

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

@return The bytes for markup.
java-texttospeech/proto-google-cloud-texttospeech-v1/src/main/java/com/google/cloud/texttospeech/v1/StreamingSynthesisInput.java