public ServerBuilder accessLogFormat(String accessLogFormat) {
        return accessLogWriter(AccessLogWriter.custom(requireNonNull(accessLogFormat, "accessLogFormat")),
                               false);
    }
Sets the format of this {@link Server}'s access log. The specified {@code accessLogFormat} would be
parsed by {@link AccessLogWriter#custom(String)}.
core/src/main/java/com/linecorp/armeria/server/ServerBuilder.java