title: WooCommerce get_weight hook
body: <p>Is there any hook to WooCommerce get_weight() like below. It seems like there - But it's not working</p>
  
  <pre><code>// define the &lt;get_hook_prefix&gt;weight callback 
  
  function filter_get_hook_prefix_weight( $this_weight, $instance ) { 
  $this_weight = 10;
  return $this_weight; 
  }
  // add the filter 
  add_filter( "woocommerce_data_get_weight", 'filter_get_hook_prefix_weight', 10, 2 );
  </code></pre>