title: How to get Shipping Methods custom additional data in Woocommerce?
body: <p>From this <a href="https://stackoverflow.com/a/60041709/5412773">comment</a> I've created custom field &quot;Shipping Method Description&quot; inside shipping methods:</p>
  <pre class="lang-php7 prettyprint-override"><code>add_action('woocommerce_init', 'shipping_instance_form_fields_filters');
  
  function shipping_instance_form_fields_filters(){
      $shipping_methods = WC()-&gt;shipping-&gt;get_shipping_methods();
      foreach($shipping_methods as $shipping_method) {
          add_filter('woocommerce_shipping_instance_form_fields_' . $shipping_method-&gt;id, 'shipping_instance_form_add_extra_fields');
      }
  }
  
  function shipping_instance_form_add_extra_fields( $settings ){
      $settings['shipping_method_description'] = [
          'title'       =&gt; 'Shipping Method Description',
          'type'        =&gt; 'text', 
          'placeholder' =&gt; 'shipping',
          'description' =&gt; ''
      ];
  
      return $settings;
  }
  </code></pre>
  <p>But I can't understand how to get this data in front-end inside my custom shipping template(/cart/cart-shipping.php) like:</p>
  <pre class="lang-php7 prettyprint-override"><code>&lt;?php if ( $available_methods ) : ?&gt;
      &lt;?php foreach ( $available_methods as $method ) : ?&gt;
  
          &lt;p&gt;&lt;?php /* Method Description ??? */ ?&gt;&lt;/p&gt;
  
          &lt;p&gt;&lt;?= $method-&gt;get_label(); ?&gt;&lt;/p&gt;
          &lt;p&gt;&lt;?= $method-&gt;cost; ?&gt;&lt;/p&gt;
  
      &lt;?php endforeach; ?&gt;
  &lt;?php endif; ?&gt;
  </code></pre>
  <p>This <a href="https://stackoverflow.com/a/64064609/5412773">comment</a> isn't clear for me how to get this instance settings.<br/>
  Can anyone suggest a solution?</p>