public static com.google.cloud.visionai.v1.OccupancyCountingPredictionResult.TrackInfo
        parseFrom(java.io.InputStream input) throws java.io.IOException {
      return com.google.protobuf.GeneratedMessageV3.parseWithIOException(PARSER, input);
    }
<pre>
Start timestamp of this track.
</pre>

<code>.google.protobuf.Timestamp start_time = 2;</code>
java-visionai/proto-google-cloud-visionai-v1/src/main/java/com/google/cloud/visionai/v1/OccupancyCountingPredictionResult.java