public static Builder newBuilder() {
      return DEFAULT_INSTANCE.toBuilder();
    }
<pre>
Spot tier definition.
</pre>

Protobuf type {@code google.cloud.tpu.v2alpha1.QueuedResource.Spot}
java-tpu/proto-google-cloud-tpu-v2alpha1/src/main/java/com/google/cloud/tpu/v2alpha1/QueuedResource.java