public Config getConfig() {
    if (isBootstrapped) {
      return new MapConfig(configMap);
    } else {
      throw new SamzaException("Must call bootstrap before retrieving config.");
    }
  }
@return The bootstrapped configuration that's been read after bootstrap has
been invoked.
samza-core/src/main/java/org/apache/samza/coordinator/stream/CoordinatorStreamSystemConsumer.java