public boolean hasStartTime() {
      return ((bitField0_ & 0x00000001) != 0);
    }
<pre>
Time when the request was received.
</pre>

<code>.google.protobuf.Timestamp start_time = 1;</code>

@return Whether the startTime field is set.
java-texttospeech/proto-google-cloud-texttospeech-v1beta1/src/main/java/com/google/cloud/texttospeech/v1beta1/SynthesizeLongAudioMetadata.java