public Builder addFeatures(
        int index, com.google.cloud.vision.v1p3beta1.Feature.Builder builderForValue) {
      if (featuresBuilder_ == null) {
        ensureFeaturesIsMutable();
        features_.add(index, builderForValue.build());
        onChanged();
      } else {
        featuresBuilder_.addMessage(index, builderForValue.build());
      }
      return this;
    }
<pre>
Requested features.
</pre>

<code>repeated .google.cloud.vision.v1p3beta1.Feature features = 2;</code>
java-vision/proto-google-cloud-vision-v1p3beta1/src/main/java/com/google/cloud/vision/v1p3beta1/AnnotateImageRequest.java