title: Get Order Notes from a Woocommerce Order / WC_Order object?
body: <p>I can add an order note (private note) with:</p>
  
  <pre><code>$order-&gt;add_order_note($info_for_order);
  </code></pre>
  
  <p>But when I tried to get the values in some page with: </p>
  
  <pre><code>get_comments(['post_id' =&gt; $order_id])
  // or
  $order_object-&gt;get_customer_order_notes()
  </code></pre>
  
  <p>It simply returns an empty array. I googled this and i can't find the method to do it. </p>