public Builder clearTrackingId() {
      trackingId_ = getDefaultInstance().getTrackingId();
      bitField0_ = (bitField0_ & ~0x00000200);
      onChanged();
      return this;
    }
<pre>
The tracking ID uniquely identifies a vulnerability instance across
multiple ScanRuns.
</pre>

<code>string tracking_id = 10;</code>

@return This builder for chaining.
java-websecurityscanner/proto-google-cloud-websecurityscanner-v1alpha/src/main/java/com/google/cloud/websecurityscanner/v1alpha/Finding.java