private com.google.protobuf.SingleFieldBuilderV3<
            com.google.cloud.vision.v1p2beta1.TextAnnotation,
            com.google.cloud.vision.v1p2beta1.TextAnnotation.Builder,
            com.google.cloud.vision.v1p2beta1.TextAnnotationOrBuilder>
        getFullTextAnnotationFieldBuilder() {
      if (fullTextAnnotationBuilder_ == null) {
        fullTextAnnotationBuilder_ =
            new com.google.protobuf.SingleFieldBuilderV3<
                com.google.cloud.vision.v1p2beta1.TextAnnotation,
                com.google.cloud.vision.v1p2beta1.TextAnnotation.Builder,
                com.google.cloud.vision.v1p2beta1.TextAnnotationOrBuilder>(
                getFullTextAnnotation(), getParentForChildren(), isClean());
        fullTextAnnotation_ = null;
      }
      return fullTextAnnotationBuilder_;
    }
<pre>
If present, text (OCR) detection or document (OCR) text detection has
completed successfully.
This annotation provides the structural hierarchy for the OCR detected
text.
</pre>

<code>.google.cloud.vision.v1p2beta1.TextAnnotation full_text_annotation = 12;</code>
java-vision/proto-google-cloud-vision-v1p2beta1/src/main/java/com/google/cloud/vision/v1p2beta1/AnnotateImageResponse.java