/**
  * Convert a WC Product or Variation into a Square ItemVariation
  * See: https://docs.connect.squareup.com/api/connect/v1/#datatype-itemvariation
  *
  * @param WC_Product|WC_Product_Variation $variation
  * @param bool                            $include_inventory
  * @return array Formatted as a Square ItemVariation
  */
 public static function format_wc_variation_for_square_api($variation, $include_inventory = false)
 {
     $formatted = array('name' => null, 'pricing_type' => null, 'price_money' => null, 'sku' => null, 'track_inventory' => null, 'inventory_alert_type' => null, 'inventory_alert_threshold' => null, 'user_data' => null);
     if ($variation instanceof WC_Product) {
         $formatted['name'] = __('Regular', 'woocommerce-square');
         $formatted['price_money'] = array('currency_code' => apply_filters('woocommerce_square_currency', get_woocommerce_currency()), 'amount' => $variation->get_display_price() * 100);
         $formatted['sku'] = $variation->get_sku();
         if ($include_inventory && $variation->managing_stock()) {
             $formatted['track_inventory'] = true;
         }
     }
     if ($variation instanceof WC_Product_Variation) {
         $formatted['name'] = implode(', ', $variation->get_variation_attributes());
     }
     return array_filter($formatted);
 }