public void setExposedHeaders(List<String> exposedHeaders) {
        this.exposedHeaders = exposedHeaders;
    }
How long the response from a pre-flight request can be cached by clients. If a
duration suffix is not specified, seconds will be used.
spring/boot3-actuator-autoconfigure/src/main/java/com/linecorp/armeria/spring/actuate/CorsEndpointProperties.java