public Builder clearVttFormatUri() {
      vttFormatUri_ = getDefaultInstance().getVttFormatUri();
      bitField0_ = (bitField0_ & ~0x00000002);
      onChanged();
      return this;
    }
<pre>
The Cloud Storage URI to which recognition results were written as VTT
formatted captions. This is populated only when `VTT` output is requested.
</pre>

<code>string vtt_format_uri = 2;</code>

@return This builder for chaining.
java-speech/proto-google-cloud-speech-v2/src/main/java/com/google/cloud/speech/v2/CloudStorageResult.java