public static function anonymize_completed_orders( $limit = 20 ) {
		$option = wc_parse_relative_date_option( get_option( 'woocommerce_anonymize_completed_orders' ) );

		if ( empty( $option['number'] ) ) {
			return 0;
		}

		return self::anonymize_orders_query(
			apply_filters(
				'woocommerce_anonymize_completed_orders_query_args',
				array(
					'date_created' => '<' . strtotime( '-' . $option['number'] . ' ' . $option['unit'] ),
					'limit'        => $limit, // Batches of 20.
					'status'       => 'wc-completed',
					'anonymized'   => false,
					'type'         => 'shop_order',
				)
			)
		);
	}