public Builder setNode(com.google.cloud.tpu.v2alpha1.Node value) {
      if (nodeBuilder_ == null) {
        if (value == null) {
          throw new NullPointerException();
        }
        node_ = value;
      } else {
        nodeBuilder_.setMessage(value);
      }
      bitField0_ |= 0x00000002;
      onChanged();
      return this;
    }
<pre>
Required. The node. Only fields specified in update_mask are updated.
</pre>

<code>.google.cloud.tpu.v2alpha1.Node node = 2 [(.google.api.field_behavior) = REQUIRED];
</code>
java-tpu/proto-google-cloud-tpu-v2alpha1/src/main/java/com/google/cloud/tpu/v2alpha1/UpdateNodeRequest.java