public com.google.protobuf.ByteString getModelBytes() {
      java.lang.Object ref = model_;
      if (ref instanceof String) {
        com.google.protobuf.ByteString b =
            com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
        model_ = b;
        return b;
      } else {
        return (com.google.protobuf.ByteString) ref;
      }
    }
<pre>
Which model to select for the given request. Select the model
best suited to your domain to get best results. If a model is not
explicitly specified, then we auto-select a model based on the parameters
in the RecognitionConfig.
&lt;table&gt;
  &lt;tr&gt;
    &lt;td&gt;&lt;b&gt;Model&lt;/b&gt;&lt;/td&gt;
    &lt;td&gt;&lt;b&gt;Description&lt;/b&gt;&lt;/td&gt;
  &lt;/tr&gt;
  &lt;tr&gt;
    &lt;td&gt;&lt;code&gt;latest_long&lt;/code&gt;&lt;/td&gt;
    &lt;td&gt;Best for long form content like media or conversation.&lt;/td&gt;
  &lt;/tr&gt;
  &lt;tr&gt;
    &lt;td&gt;&lt;code&gt;latest_short&lt;/code&gt;&lt;/td&gt;
    &lt;td&gt;Best for short form content like commands or single shot directed
    speech.&lt;/td&gt;
  &lt;/tr&gt;
  &lt;tr&gt;
    &lt;td&gt;&lt;code&gt;command_and_search&lt;/code&gt;&lt;/td&gt;
    &lt;td&gt;Best for short queries such as voice commands or voice search.&lt;/td&gt;
  &lt;/tr&gt;
  &lt;tr&gt;
    &lt;td&gt;&lt;code&gt;phone_call&lt;/code&gt;&lt;/td&gt;
    &lt;td&gt;Best for audio that originated from a phone call (typically
    recorded at an 8khz sampling rate).&lt;/td&gt;
  &lt;/tr&gt;
  &lt;tr&gt;
    &lt;td&gt;&lt;code&gt;video&lt;/code&gt;&lt;/td&gt;
    &lt;td&gt;Best for audio that originated from video or includes multiple
        speakers. Ideally the audio is recorded at a 16khz or greater
        sampling rate. This is a premium model that costs more than the
        standard rate.&lt;/td&gt;
  &lt;/tr&gt;
  &lt;tr&gt;
    &lt;td&gt;&lt;code&gt;default&lt;/code&gt;&lt;/td&gt;
    &lt;td&gt;Best for audio that is not one of the specific audio models.
        For example, long-form audio. Ideally the audio is high-fidelity,
        recorded at a 16khz or greater sampling rate.&lt;/td&gt;
  &lt;/tr&gt;
  &lt;tr&gt;
    &lt;td&gt;&lt;code&gt;medical_conversation&lt;/code&gt;&lt;/td&gt;
    &lt;td&gt;Best for audio that originated from a conversation between a
        medical provider and patient.&lt;/td&gt;
  &lt;/tr&gt;
  &lt;tr&gt;
    &lt;td&gt;&lt;code&gt;medical_dictation&lt;/code&gt;&lt;/td&gt;
    &lt;td&gt;Best for audio that originated from dictation notes by a medical
        provider.&lt;/td&gt;
  &lt;/tr&gt;
&lt;/table&gt;
</pre>

<code>string model = 13;</code>

@return The bytes for model.
java-speech/proto-google-cloud-speech-v1/src/main/java/com/google/cloud/speech/v1/RecognitionConfig.java