@java.lang.Override
    public float getBoost() {
      return boost_;
    }
<pre>
Hint Boost. Positive value will increase the probability that a specific
phrase will be recognized over other similar sounding phrases. The higher
the boost, the higher the chance of false positive recognition as well.
Valid `boost` values are between 0 (exclusive) and 20. We recommend using a
binary search approach to finding the optimal value for your use case as
well as adding phrases both with and without boost to your requests.
</pre>

<code>float boost = 4;</code>

@return The boost.
java-speech/proto-google-cloud-speech-v2/src/main/java/com/google/cloud/speech/v2/PhraseSet.java