public int getDataDisksCount() {
      if (dataDisksBuilder_ == null) {
        return dataDisks_.size();
      } else {
        return dataDisksBuilder_.getCount();
      }
    }
<pre>
The additional data disks for the Node.
</pre>

<code>repeated .google.cloud.tpu.v2alpha1.AttachedDisk data_disks = 41;</code>
java-tpu/proto-google-cloud-tpu-v2alpha1/src/main/java/com/google/cloud/tpu/v2alpha1/Node.java