title: Add submenu entry to WooCommerce "Products" admin menu
body: <p>I would like to add a submenu entry under the WooCommerce &quot;Products&quot; admin menu. Does anybody know what the $parent_slug for this menu is?</p>
  <p>I can add a submenu item to the &quot;WooCommerce&quot; menu using <code>add_submenu_page</code> and 'woocommerce' for <code>$parent_slug</code> (via the <code>admin_menu</code> hook), but can't seem to figure out what the <code>$parent_slug</code> for the Products menu is...</p>
  <pre class="lang-php prettyprint-override"><code>if ( is_admin() ) {
      add_action( 'admin_menu', 'add_products_menu_entry', 100 );
  }
  
  function add_products_menu_entry() {
      add_submenu_page(
          'woocommerce-product', // This is what I can't figure out
          __( 'Product Grabber' ),
          __( 'Grab New' ),
          'manage_woocommerce', // Required user capability
          'ddg-product',
          'generate_grab_product_page'
      );
  }
  
  function generate_grab_product_page() {
    // Page generation code will go here
  }
  </code></pre>
  <p>WooCommerce Products Admin Menu</p>
  <p><a href="https://i.stack.imgur.com/5FVnX.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/5FVnX.png" alt="enter image description here" /></a></p>