@java.lang.Override
    public void writeTo(com.google.protobuf.CodedOutputStream output) throws java.io.IOException {
      for (int i = 0; i < abnfStrings_.size(); i++) {
        com.google.protobuf.GeneratedMessageV3.writeString(output, 1, abnfStrings_.getRaw(i));
      }
      getUnknownFields().writeTo(output);
    }
<pre>
All declarations and rules of an ABNF grammar broken up into multiple
strings that will end up concatenated.
</pre>

<code>repeated string abnf_strings = 1;</code>

@param index The index of the value to return.
@return The bytes of the abnfStrings at the given index.
java-speech/proto-google-cloud-speech-v1/src/main/java/com/google/cloud/speech/v1/SpeechAdaptation.java