ode'   => $address->get_billing_postcode(),
					'country'    => $billing_country,
					'email'      => $address->get_billing_email(),
					'phone'      => $address->get_billing_phone(),
				],
				$additional_address_fields
			);

			// Add any missing keys from additional_fields_controller to the address response.
			foreach ( $this->additional_fields_controller->get_address_fields_keys() as $field ) {
				if ( isset( $address_object[ $field ] ) ) {
					continue;
				}
				$address_object[ $field ] = '';
			}

			foreach ( $address_object as $key => $value ) {
				if ( isset( $this->get_properties()[ $key ]['type'] ) && 'boolean' === $this->get_properties()[ $key ]['type'] ) {
					$address_object[ $key ] = (bool) $value;
				} else {
					$address_object[ $key ] = $this->prepare_html_response( $value );
				}
			}
			return $address_object;

		}
		throw new RouteException(
			'invalid_object_type',
			sprintf(
				/* translators: Placeholders are class and method names */
				__( '%1$s requires an instance of %2$s or %3$s for the address', 'woocommerce' ),
				'BillingAddressSchema::get_item_response',
				'WC_Customer',
				'WC_Order'
			),
			500
		);
	}
}