public static TomcatService of(Connector connector, String hostname) {
        requireNonNull(connector, "connector");
        requireNonNull(hostname, "hostname");
        return new UnmanagedTomcatService(connector, hostname);
    }
Creates a new {@link TomcatService} from an existing Tomcat {@link Connector} instance.
If the specified {@link Connector} instance is not configured properly, the returned
{@link TomcatService} may respond with '503 Service Not Available' error.

@return a new {@link TomcatService}, which will not manage the provided {@link Connector} instance.
tomcat10/src/main/java/com/linecorp/armeria/server/tomcat/TomcatService.java