@java.lang.Override
  public com.google.cloud.vision.v1p4beta1.ImageSource getSource() {
    return source_ == null
        ? com.google.cloud.vision.v1p4beta1.ImageSource.getDefaultInstance()
        : source_;
  }
<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.v1p4beta1.ImageSource source = 2;</code>

@return The source.
java-vision/proto-google-cloud-vision-v1p4beta1/src/main/java/com/google/cloud/vision/v1p4beta1/Image.java