static OperationArgumentResolver acceptHeadersResolver(HttpHeaders headers) {
        return new ProducibleOperationArgumentResolver(() -> headers.getAll(HttpHeaderNames.ACCEPT));
    }
A utility class to support {@link OperationArgumentResolver} which was introduced from Spring Boot 2.5+.
The method in this class is called only if
{@code WebOperationService#HAS_PRODUCIBLE_OPERATION_ARGUMENT_RESOLVER} is {@code true}.
spring/boot3-actuator-autoconfigure/src/main/java/com/linecorp/armeria/spring/actuate/OperationArgumentResolverUtil.java