@java.lang.Override
    public com.google.protobuf.ByteString getThumbnail() {
      return thumbnail_;
    }
<pre>
The thumbnail of a person's face.
</pre>

<code>bytes thumbnail = 4;</code>

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