@Override
    public String toString() {
        return MoreObjects.toStringHelper(this).omitNullValues()
                          .add("docService", docService)
                          .add("metricsExpositionService", metricsExpositionService)
                          .add("healthCheckService", healthCheckService)
                          .add("internalServicePort", internalServicePort)
                          .add("managementServerPort", managementServerPort)
                          .toString();
    }
Returns the management server port of
{@code org.springframework.boot.actuate.autoconfigure.web.server.ManagementServerProperties}.
spring/boot3-autoconfigure/src/main/java/com/linecorp/armeria/spring/InternalServices.java