private void ensurePartialMatchingImagesIsMutable() {
        if (!((bitField0_ & 0x00000010) != 0)) {
          partialMatchingImages_ =
              new java.util.ArrayList<com.google.cloud.vision.v1p1beta1.WebDetection.WebImage>(
                  partialMatchingImages_);
          bitField0_ |= 0x00000010;
        }
      }
<pre>
Fully matching images on the page.
Can include resized copies of the query image.
</pre>

<code>
repeated .google.cloud.vision.v1p1beta1.WebDetection.WebImage full_matching_images = 4;
</code>
java-vision/proto-google-cloud-vision-v1p1beta1/src/main/java/com/google/cloud/vision/v1p1beta1/WebDetection.java