public Builder mergeStreamingConfig(
        com.google.cloud.texttospeech.v1beta1.StreamingSynthesizeConfig value) {
      if (streamingConfigBuilder_ == null) {
        if (streamingRequestCase_ == 1
            && streamingRequest_
                != com.google.cloud.texttospeech.v1beta1.StreamingSynthesizeConfig
                    .getDefaultInstance()) {
          streamingRequest_ =
              com.google.cloud.texttospeech.v1beta1.StreamingSynthesizeConfig.newBuilder(
                      (com.google.cloud.texttospeech.v1beta1.StreamingSynthesizeConfig)
                          streamingRequest_)
                  .mergeFrom(value)
                  .buildPartial();
        } else {
          streamingRequest_ = value;
        }
        onChanged();
      } else {
        if (streamingRequestCase_ == 1) {
          streamingConfigBuilder_.mergeFrom(value);
        } else {
          streamingConfigBuilder_.setMessage(value);
        }
      }
      streamingRequestCase_ = 1;
      return this;
    }
<pre>
StreamingSynthesizeConfig to be used in this streaming attempt. Only
specified in the first message sent in a `StreamingSynthesize` call.
</pre>

<code>.google.cloud.texttospeech.v1beta1.StreamingSynthesizeConfig streaming_config = 1;
</code>
java-texttospeech/proto-google-cloud-texttospeech-v1beta1/src/main/java/com/google/cloud/texttospeech/v1beta1/StreamingSynthesizeRequest.java