@java.lang.Override
  public int getIndustryNaicsCodeOfAudio() {
    return industryNaicsCodeOfAudio_;
  }
<pre>
The industry vertical to which this speech recognition request most
closely applies. This is most indicative of the topics contained
in the audio.  Use the 6-digit NAICS code to identify the industry
vertical - see https://www.naics.com/search/.
</pre>

<code>uint32 industry_naics_code_of_audio = 3;</code>

@return The industryNaicsCodeOfAudio.
java-speech/proto-google-cloud-speech-v1p1beta1/src/main/java/com/google/cloud/speech/v1p1beta1/RecognitionMetadata.java