@java.lang.Override
  public int getSerializedSize() {
    int size = memoizedSize;
    if (size != -1) return size;

    size = 0;
    for (int i = 0; i < faceAnnotations_.size(); i++) {
      size += com.google.protobuf.CodedOutputStream.computeMessageSize(1, faceAnnotations_.get(i));
    }
    for (int i = 0; i < landmarkAnnotations_.size(); i++) {
      size +=
          com.google.protobuf.CodedOutputStream.computeMessageSize(2, landmarkAnnotations_.get(i));
    }
    for (int i = 0; i < logoAnnotations_.size(); i++) {
      size += com.google.protobuf.CodedOutputStream.computeMessageSize(3, logoAnnotations_.get(i));
    }
    for (int i = 0; i < labelAnnotations_.size(); i++) {
      size += com.google.protobuf.CodedOutputStream.computeMessageSize(4, labelAnnotations_.get(i));
    }
    for (int i = 0; i < textAnnotations_.size(); i++) {
      size += com.google.protobuf.CodedOutputStream.computeMessageSize(5, textAnnotations_.get(i));
    }
    if (((bitField0_ & 0x00000002) != 0)) {
      size +=
          com.google.protobuf.CodedOutputStream.computeMessageSize(6, getSafeSearchAnnotation());
    }
    if (((bitField0_ & 0x00000004) != 0)) {
      size +=
          com.google.protobuf.CodedOutputStream.computeMessageSize(
              8, getImagePropertiesAnnotation());
    }
    if (((bitField0_ & 0x00000020) != 0)) {
      size += com.google.protobuf.CodedOutputStream.computeMessageSize(9, getError());
    }
    if (((bitField0_ & 0x00000008) != 0)) {
      size +=
          com.google.protobuf.CodedOutputStream.computeMessageSize(11, getCropHintsAnnotation());
    }
    if (((bitField0_ & 0x00000001) != 0)) {
      size += com.google.protobuf.CodedOutputStream.computeMessageSize(12, getFullTextAnnotation());
    }
    if (((bitField0_ & 0x00000010) != 0)) {
      size += com.google.protobuf.CodedOutputStream.computeMessageSize(13, getWebDetection());
    }
    if (((bitField0_ & 0x00000040) != 0)) {
      size += com.google.protobuf.CodedOutputStream.computeMessageSize(21, getContext());
    }
    size += getUnknownFields().getSerializedSize();
    memoizedSize = size;
    return size;
  }
<pre>
If present, contextual information is needed to understand where this image
comes from.
</pre>

<code>.google.cloud.vision.v1p2beta1.ImageAnnotationContext context = 21;</code>
java-vision/proto-google-cloud-vision-v1p2beta1/src/main/java/com/google/cloud/vision/v1p2beta1/AnnotateImageResponse.java