public Builder setStreamingConfig(
        com.google.cloud.texttospeech.v1beta1.StreamingSynthesizeConfig.Builder builderForValue) {
      if (streamingConfigBuilder_ == null) {
        streamingRequest_ = builderForValue.build();
        onChanged();
      } else {
        streamingConfigBuilder_.setMessage(builderForValue.build());
      }
      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