private com.google.protobuf.SingleFieldBuilderV3<
            com.google.cloud.video.transcoder.v1.TextStream,
            com.google.cloud.video.transcoder.v1.TextStream.Builder,
            com.google.cloud.video.transcoder.v1.TextStreamOrBuilder>
        getTextStreamFieldBuilder() {
      if (textStreamBuilder_ == null) {
        if (!(elementaryStreamCase_ == 3)) {
          elementaryStream_ = com.google.cloud.video.transcoder.v1.TextStream.getDefaultInstance();
        }
        textStreamBuilder_ =
            new com.google.protobuf.SingleFieldBuilderV3<
                com.google.cloud.video.transcoder.v1.TextStream,
                com.google.cloud.video.transcoder.v1.TextStream.Builder,
                com.google.cloud.video.transcoder.v1.TextStreamOrBuilder>(
                (com.google.cloud.video.transcoder.v1.TextStream) elementaryStream_,
                getParentForChildren(),
                isClean());
        elementaryStream_ = null;
      }
      elementaryStreamCase_ = 3;
      onChanged();
      return textStreamBuilder_;
    }
<pre>
Encoding of a text stream. For example, closed captions or subtitles.
</pre>

<code>.google.cloud.video.transcoder.v1.TextStream text_stream = 3;</code>
java-video-transcoder/proto-google-cloud-video-transcoder-v1/src/main/java/com/google/cloud/video/transcoder/v1/ElementaryStream.java