public com.google.protobuf.ByteString getLocationIdBytes() {
      java.lang.Object ref = locationId_;
      if (ref instanceof String) {
        com.google.protobuf.ByteString b =
            com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
        locationId_ = b;
        return b;
      } else {
        return (com.google.protobuf.ByteString) ref;
      }
    }
<pre>
Optional. Cloud region where annotation should take place. Supported cloud
regions: `us-east1`, `us-west1`, `europe-west1`, `asia-east1`. If no region
is specified, a region will be determined based on video file location.
</pre>

<code>string location_id = 5 [(.google.api.field_behavior) = OPTIONAL];</code>

@return The bytes for locationId.
java-video-intelligence/proto-google-cloud-video-intelligence-v1p2beta1/src/main/java/com/google/cloud/videointelligence/v1p2beta1/AnnotateVideoRequest.java