public Builder clearBestEffort() {
      if (bestEffortBuilder_ == null) {
        if (tierCase_ == 3) {
          tierCase_ = 0;
          tier_ = null;
          onChanged();
        }
      } else {
        if (tierCase_ == 3) {
          tierCase_ = 0;
          tier_ = null;
        }
        bestEffortBuilder_.clear();
      }
      return this;
    }
<pre>
The BestEffort tier.
</pre>

<code>.google.cloud.tpu.v2alpha1.QueuedResource.BestEffort best_effort = 3;</code>
java-tpu/proto-google-cloud-tpu-v2alpha1/src/main/java/com/google/cloud/tpu/v2alpha1/QueuedResource.java