public void set(String key, String value) {
        if (value != null) {
            configStorage.put(key, new JsonPrimitive(value));
            return;
        }

        // del
        if (configStorage.containsKey(key)) {
            configStorage.remove(key);
        }
    }
set key/value

@param key key
@param value value
inlong-agent/agent-common/src/main/java/org/apache/inlong/agent/conf/AbstractConfiguration.java