public Builder setFeatures(int index, com.google.cloud.vision.v1.Feature value) {
      if (featuresBuilder_ == null) {
        if (value == null) {
          throw new NullPointerException();
        }
        ensureFeaturesIsMutable();
        features_.set(index, value);
        onChanged();
      } else {
        featuresBuilder_.setMessage(index, value);
      }
      return this;
    }
<pre>
Required. Requested features.
</pre>

<code>repeated .google.cloud.vision.v1.Feature features = 2;</code>
java-vision/proto-google-cloud-vision-v1/src/main/java/com/google/cloud/vision/v1/AsyncAnnotateFileRequest.java