static String toString(Object holder, String serviceName, @Nullable String engineName,
                           @Nullable Path baseDir, @Nullable Realm realm, @Nullable String hostname,
                           Path docBase, @Nullable String jarRoot) {

        return holder.getClass().getSimpleName() +
               "(serviceName: " + serviceName +
               ", engineName: " + engineName +
               ", baseDir: " + baseDir +
               ", realm: " + (realm != null ? realm.getClass().getSimpleName() : "null") +
               ", hostname: " + hostname +
               ", docBase: " + docBase +
               (jarRoot != null ? ", jarRoot: " + jarRoot : "") +
               ')';
    }
Returns the {@link Consumer}s that performs additional configuration operations against
the Tomcat {@link StandardServer} created by a {@link TomcatService}.
tomcat10/src/main/java/com/linecorp/armeria/server/tomcat/TomcatServiceConfig.java