WC_AJAX::shipping_zone_add_method() – Handle submissions from assets/js/wc-shipping-zone-methods.js Backbone model.
WC_AJAX::shipping_zone_methods_save_changes() – Handle submissions from assets/js/wc-shipping-zone-methods.js Backbone model.
WC_AJAX::shipping_zones_save_changes() – Handle submissions from assets/js/wc-shipping-zones.js Backbone model.
WC_Shipping_Zone_Data_Store::get_zone_id_from_package() – Find a matching zone ID for a given package.
WC_Shipping_Zone::get_formatted_location() – Return a text string representing what this zone is for.