private com.google.protobuf.SingleFieldBuilderV3<
            com.google.cloud.vision.v1p2beta1.ImageSource,
            com.google.cloud.vision.v1p2beta1.ImageSource.Builder,
            com.google.cloud.vision.v1p2beta1.ImageSourceOrBuilder>
        getSourceFieldBuilder() {
      if (sourceBuilder_ == null) {
        sourceBuilder_ =
            new com.google.protobuf.SingleFieldBuilderV3<
                com.google.cloud.vision.v1p2beta1.ImageSource,
                com.google.cloud.vision.v1p2beta1.ImageSource.Builder,
                com.google.cloud.vision.v1p2beta1.ImageSourceOrBuilder>(
                getSource(), getParentForChildren(), isClean());
        source_ = null;
      }
      return sourceBuilder_;
    }
<pre>
Google Cloud Storage image location, or publicly-accessible image
URL. If both `content` and `source` are provided for an image, `content`
takes precedence and is used to perform the image annotation request.
</pre>

<code>.google.cloud.vision.v1p2beta1.ImageSource source = 2;</code>
java-vision/proto-google-cloud-vision-v1p2beta1/src/main/java/com/google/cloud/vision/v1p2beta1/Image.java