private void ensureBestGuessLabelsIsMutable() {
      if (!((bitField0_ & 0x00000020) != 0)) {
        bestGuessLabels_ =
            new java.util.ArrayList<com.google.cloud.vision.v1p1beta1.WebDetection.WebLabel>(
                bestGuessLabels_);
        bitField0_ |= 0x00000020;
      }
    }
<pre>
The visually similar image results.
</pre>

<code>
repeated .google.cloud.vision.v1p1beta1.WebDetection.WebImage visually_similar_images = 6;
</code>
java-vision/proto-google-cloud-vision-v1p1beta1/src/main/java/com/google/cloud/vision/v1p1beta1/WebDetection.java