public com.google.cloud.tpu.v2alpha1.BootDiskConfig.Builder getBootDiskConfigBuilder() {
      bitField0_ |= 0x04000000;
      onChanged();
      return getBootDiskConfigFieldBuilder().getBuilder();
    }
<pre>
Optional. Boot disk configuration.
</pre>

<code>
.google.cloud.tpu.v2alpha1.BootDiskConfig boot_disk_config = 49 [(.google.api.field_behavior) = OPTIONAL];
</code>
java-tpu/proto-google-cloud-tpu-v2alpha1/src/main/java/com/google/cloud/tpu/v2alpha1/Node.java