code: public java.util.List<OptionGroup> getOptionGroupsList() {
          if (optionGroupsList == null) {
              optionGroupsList = new com.amazonaws.internal.SdkInternalList<OptionGroup>();
          }
          return optionGroupsList;
      }
docs: <p>
  List of option groups.
  </p>
  
  @return List of option groups.