@java.lang.Override
    public com.google.protobuf.Parser<TrackInfo> getParserForType() {
      return PARSER;
    }
<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