public java.lang.String getLocationId() {
      java.lang.Object ref = locationId_;
      if (!(ref instanceof java.lang.String)) {
        com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
        java.lang.String s = bs.toStringUtf8();
        locationId_ = s;
        return s;
      } else {
        return (java.lang.String) ref;
      }
    }
<pre>
Optional. Cloud region where annotation should take place. Supported cloud
regions are: `us-east1`, `us-west1`, `europe-west1`, `asia-east1`. If no
region is specified, the region will be determined based on video file
location.
</pre>

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

@return The locationId.
java-video-intelligence/proto-google-cloud-video-intelligence-v1p3beta1/src/main/java/com/google/cloud/videointelligence/v1p3beta1/AnnotateVideoRequest.java