public Builder setTrackId(long value) {

        trackId_ = value;
        bitField0_ |= 0x00000010;
        onChanged();
        return this;
      }
<pre>
The same object may be identified on muitiple frames which are typical
adjacent. The set of frames where a particular object has been detected
form a track. This track_id can be used to trace down all frames for an
detected object.
</pre>

<code>int64 track_id = 5;</code>

@param value The trackId to set.
@return This builder for chaining.
java-visionai/proto-google-cloud-visionai-v1/src/main/java/com/google/cloud/visionai/v1/VideoObjectTrackingPredictionResult.java