code: public java.util.List<ConfigurationItem> getConfigurationItems() {
          if (configurationItems == null) {
              configurationItems = new com.amazonaws.internal.SdkInternalList<ConfigurationItem>();
          }
          return configurationItems;
      }
docs: <p>
  A list that contains the configuration history of one or more resources.
  </p>
  
  @return A list that contains the configuration history of one or more resources.