@java.lang.Override
  public void writeTo(com.google.protobuf.CodedOutputStream output) throws java.io.IOException {
    com.google.protobuf.GeneratedMessageV3.serializeStringMapTo(
        output, internalGetModelFeatures(), ModelFeaturesDefaultEntryHolder.defaultEntry, 1);
    getUnknownFields().writeTo(output);
  }
<pre>
Map of the model name -&gt; features of that model
</pre>

<code>map&lt;string, .google.cloud.speech.v2.ModelFeatures&gt; model_features = 1;</code>
java-speech/proto-google-cloud-speech-v2/src/main/java/com/google/cloud/speech/v2/ModelMetadata.java