public boolean hasError() {
      return ((bitField0_ & 0x00000400) != 0);
    }
<pre>
If set, represents the error message for the operation.
Note that filled-in image annotations are guaranteed to be
correct, even when `error` is set.
</pre>

<code>.google.rpc.Status error = 9;</code>

@return Whether the error field is set.
java-vision/proto-google-cloud-vision-v1p2beta1/src/main/java/com/google/cloud/vision/v1p2beta1/AnnotateImageResponse.java