protected static Object getOrDefault(Map<String, Object> configMap, String key, Object defaultValue) {
        if (configMap.containsKey(key))
            return configMap.get(key);

        return defaultValue;
    }
Configures KeyStore related settings in SslContextFactory
connect/runtime/src/main/java/org/apache/kafka/connect/runtime/rest/util/SSLUtils.java