@SuppressWarnings({"rawtypes"})
    protected com.google.protobuf.MapFieldReflectionAccessor internalGetMapFieldReflection(
        int number) {
      switch (number) {
        case 4:
          return internalGetLabels();
        default:
          throw new RuntimeException("Invalid map field number: " + number);
      }
    }
<pre>
Pool resource defines the configuration of Live Stream pools for a specific
location. Currently we support only one pool resource per project per
location. After the creation of the first input, a default pool is created
automatically at "projects/{project}/locations/{location}/pools/default".
</pre>

Protobuf type {@code google.cloud.video.livestream.v1.Pool}
java-video-live-stream/proto-google-cloud-live-stream-v1/src/main/java/com/google/cloud/video/livestream/v1/Pool.java