private com.google.protobuf.SingleFieldBuilderV3<
            com.google.cloud.tpu.v2alpha1.AccessConfig,
            com.google.cloud.tpu.v2alpha1.AccessConfig.Builder,
            com.google.cloud.tpu.v2alpha1.AccessConfigOrBuilder>
        getAccessConfigFieldBuilder() {
      if (accessConfigBuilder_ == null) {
        accessConfigBuilder_ =
            new com.google.protobuf.SingleFieldBuilderV3<
                com.google.cloud.tpu.v2alpha1.AccessConfig,
                com.google.cloud.tpu.v2alpha1.AccessConfig.Builder,
                com.google.cloud.tpu.v2alpha1.AccessConfigOrBuilder>(
                getAccessConfig(), getParentForChildren(), isClean());
        accessConfig_ = null;
      }
      return accessConfigBuilder_;
    }
<pre>
The access config for the TPU worker.
</pre>

<code>.google.cloud.tpu.v2alpha1.AccessConfig access_config = 5;</code>
java-tpu/proto-google-cloud-tpu-v2alpha1/src/main/java/com/google/cloud/tpu/v2alpha1/NetworkEndpoint.java