public Builder addAlternatives(
        com.google.cloud.speech.v2.SpeechRecognitionAlternative.Builder builderForValue) {
      if (alternativesBuilder_ == null) {
        ensureAlternativesIsMutable();
        alternatives_.add(builderForValue.build());
        onChanged();
      } else {
        alternativesBuilder_.addMessage(builderForValue.build());
      }
      return this;
    }
<pre>
May contain one or more recognition hypotheses. 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.speech.v2.SpeechRecognitionAlternative alternatives = 1;</code>
java-speech/proto-google-cloud-speech-v2/src/main/java/com/google/cloud/speech/v2/StreamingRecognitionResult.java