public com.google.protobuf.ByteString getUriBytes() {
      java.lang.Object ref = uri_;
      if (ref instanceof String) {
        com.google.protobuf.ByteString b =
            com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
        uri_ = b;
        return b;
      } else {
        return (com.google.protobuf.ByteString) ref;
      }
    }
<pre>
Google Cloud Storage URI for the input file. This must only be a
Google Cloud Storage object. Wildcards are not currently supported.
</pre>

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

@return The bytes for uri.
java-vision/proto-google-cloud-vision-v1/src/main/java/com/google/cloud/vision/v1/GcsSource.java