private static void convertHeaders(HttpHeaders headers, MimeHeaders cHeaders) {
        if (headers.isEmpty()) {
            return;
        }
        toHttp1Headers(headers, cHeaders,
                       (output, key, value) -> output.addValue(key.toString()).setString(value));
    }
Returns Tomcat {@link Connector}.

@return the Tomcat {@link Connector}, or {@code null} if the {@link Connector} is not available yet.
tomcat10/src/main/java/com/linecorp/armeria/server/tomcat/TomcatService.java