public boolean hasBootDiskConfig() {
      return ((bitField0_ & 0x04000000) != 0);
    }
<pre>
Optional. Boot disk configuration.
</pre>

<code>
.google.cloud.tpu.v2alpha1.BootDiskConfig boot_disk_config = 49 [(.google.api.field_behavior) = OPTIONAL];
</code>

@return Whether the bootDiskConfig field is set.
java-tpu/proto-google-cloud-tpu-v2alpha1/src/main/java/com/google/cloud/tpu/v2alpha1/Node.java