public com.google.cloud.videointelligence.v1.SpeechRecognitionAlternative.Builder
        addAlternativesBuilder(int index) {
      return getAlternativesFieldBuilder()
          .addBuilder(
              index,
              com.google.cloud.videointelligence.v1.SpeechRecognitionAlternative
                  .getDefaultInstance());
    }
<pre>
May contain one or more recognition hypotheses (up to the maximum specified
in `max_alternatives`).  These alternatives are ordered in terms of
accuracy, with the top (first) alternative being the most probable, as
ranked by the recognizer.
</pre>

<code>
repeated .google.cloud.videointelligence.v1.SpeechRecognitionAlternative alternatives = 1;
</code>
java-video-intelligence/proto-google-cloud-video-intelligence-v1/src/main/java/com/google/cloud/videointelligence/v1/SpeechTranscription.java