public com.google.protobuf.Duration.Builder getSpeechStartTimeoutBuilder() {
        bitField0_ |= 0x00000001;
        onChanged();
        return getSpeechStartTimeoutFieldBuilder().getBuilder();
      }
<pre>
Duration to timeout the stream if no speech begins.
</pre>

<code>.google.protobuf.Duration speech_start_timeout = 1;</code>
java-speech/proto-google-cloud-speech-v1p1beta1/src/main/java/com/google/cloud/speech/v1p1beta1/StreamingRecognitionConfig.java