private com.google.protobuf.SingleFieldBuilderV3<
            com.google.cloud.vision.v1.CropHintsAnnotation,
            com.google.cloud.vision.v1.CropHintsAnnotation.Builder,
            com.google.cloud.vision.v1.CropHintsAnnotationOrBuilder>
        getCropHintsAnnotationFieldBuilder() {
      if (cropHintsAnnotationBuilder_ == null) {
        cropHintsAnnotationBuilder_ =
            new com.google.protobuf.SingleFieldBuilderV3<
                com.google.cloud.vision.v1.CropHintsAnnotation,
                com.google.cloud.vision.v1.CropHintsAnnotation.Builder,
                com.google.cloud.vision.v1.CropHintsAnnotationOrBuilder>(
                getCropHintsAnnotation(), getParentForChildren(), isClean());
        cropHintsAnnotation_ = null;
      }
      return cropHintsAnnotationBuilder_;
    }
<pre>
If present, crop hints have completed successfully.
</pre>

<code>.google.cloud.vision.v1.CropHintsAnnotation crop_hints_annotation = 11;</code>
java-vision/proto-google-cloud-vision-v1/src/main/java/com/google/cloud/vision/v1/AnnotateImageResponse.java