public com.google.protobuf.ByteString getGcsImageUriBytes() {
      java.lang.Object ref = gcsImageUri_;
      if (ref instanceof String) {
        com.google.protobuf.ByteString b =
            com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
        gcsImageUri_ = b;
        return b;
      } else {
        return (com.google.protobuf.ByteString) ref;
      }
    }
<pre>
NOTE: For new code `image_uri` below is preferred.
Google Cloud Storage image URI, which must be in the following form:
`gs://bucket_name/object_name` (for details, see
[Google Cloud Storage Request
URIs](https://cloud.google.com/storage/docs/reference-uris)).
NOTE: Cloud Storage object versioning is not supported.
</pre>

<code>string gcs_image_uri = 1;</code>

@return The bytes for gcsImageUri.
java-vision/proto-google-cloud-vision-v1p1beta1/src/main/java/com/google/cloud/vision/v1p1beta1/ImageSource.java