public Builder clearReferenceImages() {
      if (referenceImagesBuilder_ == null) {
        referenceImages_ = java.util.Collections.emptyList();
        bitField0_ = (bitField0_ & ~0x00000001);
        onChanged();
      } else {
        referenceImagesBuilder_.clear();
      }
      return this;
    }
<pre>
The list of reference images.
</pre>

<code>repeated .google.cloud.vision.v1.ReferenceImage reference_images = 1;</code>
java-vision/proto-google-cloud-vision-v1/src/main/java/com/google/cloud/vision/v1/ListReferenceImagesResponse.java