@java.lang.Override
      public Builder clear() {
        super.clear();
        bitField0_ = 0;
        trackId_ = "";
        zoneId_ = "";
        dwellStartTime_ = null;
        if (dwellStartTimeBuilder_ != null) {
          dwellStartTimeBuilder_.dispose();
          dwellStartTimeBuilder_ = null;
        }
        dwellEndTime_ = null;
        if (dwellEndTimeBuilder_ != null) {
          dwellEndTimeBuilder_.dispose();
          dwellEndTimeBuilder_ = null;
        }
        return this;
      }
<pre>
The dwell time info for annotations from occupancy counting operator.
</pre>

Protobuf type {@code
google.cloud.visionai.v1.OccupancyCountingPredictionResult.DwellTimeInfo}
java-visionai/proto-google-cloud-visionai-v1/src/main/java/com/google/cloud/visionai/v1/OccupancyCountingPredictionResult.java