public Builder addPartialMatchingImages(
        int index, com.google.cloud.vision.v1.WebDetection.WebImage.Builder builderForValue) {
      if (partialMatchingImagesBuilder_ == null) {
        ensurePartialMatchingImagesIsMutable();
        partialMatchingImages_.add(index, builderForValue.build());
        onChanged();
      } else {
        partialMatchingImagesBuilder_.addMessage(index, builderForValue.build());
      }
      return this;
    }
<pre>
Partial matching images from the Internet.
Those images are similar enough to share some key-point features. For
example an original image will likely have partial matching for its crops.
</pre>

<code>repeated .google.cloud.vision.v1.WebDetection.WebImage partial_matching_images = 3;
</code>
java-vision/proto-google-cloud-vision-v1/src/main/java/com/google/cloud/vision/v1/WebDetection.java