public Builder setTrackingIdBytes(com.google.protobuf.ByteString value) {
      if (value == null) {
        throw new NullPointerException();
      }
      checkByteStringIsUtf8(value);
      trackingId_ = value;
      bitField0_ |= 0x00000200;
      onChanged();
      return this;
    }
<pre>
The tracking ID uniquely identifies a vulnerability instance across
multiple ScanRuns.
</pre>

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

@param value The bytes for trackingId to set.
@return This builder for chaining.
java-websecurityscanner/proto-google-cloud-websecurityscanner-v1beta/src/main/java/com/google/cloud/websecurityscanner/v1beta/Finding.java