/**
  * Cost of goods compatibility: Zero order item cost for bundled products that belong to statically priced bundles.
  *
  * @param  double   $cost
  * @param  array    $item
  * @param  WC_Order $order
  * @return double
  */
 public static function cost_of_goods_set_order_item_bundled_item_cost($cost, $item, $order)
 {
     if (!empty($item['bundled_by'])) {
         // Find bundle parent.
         $parent_item = WC_PB_Order::get_bundle_parent($item, $order);
         $per_product_pricing = !empty($parent_item) && isset($parent_item['per_product_pricing']) ? $parent_item['per_product_pricing'] : get_post_meta($parent_item['product_id'], '_per_product_pricing_active', true);
         if ($per_product_pricing === 'no') {
             return 0;
         }
     } elseif (!isset($item['bundled_by']) && isset($item['stamp'])) {
         $per_product_pricing = isset($item['per_product_pricing']) ? $item['per_product_pricing'] : get_post_meta($item['product_id'], '_per_product_pricing_active', true);
         if ($per_product_pricing === 'yes') {
             return 0;
         }
     }
     return $cost;
 }
 /**
  * Used to link bundled order items with the composite container product.
  *
  * @param  boolean  $is_child
  * @param  array    $order_item
  * @param  array    $composite_item
  * @param  WC_Order $order
  * @return boolean
  */
 public static function bundled_order_item_is_child_of_composite($is_child, $order_item, $composite_item, $order)
 {
     if (!empty($order_item['bundled_by'])) {
         $parent = WC_PB_Order::get_bundle_parent($order_item, $order);
         if ($parent && isset($parent['composite_parent']) && $parent['composite_parent'] === $composite_item['composite_cart_key']) {
             return true;
         }
     }
     return $is_child;
 }