Object getConfig(String key)

Gets a configuration value from the dslink.json

Source 

Object getConfig(String key) {
  if (dslinkJson != null &&
      dslinkJson["configs"] is Map &&
      dslinkJson["configs"][key] is Map &&
      dslinkJson["configs"][key].containsKey("value")) {
    return dslinkJson["configs"][key]["value"];
  }
  return null;
}