code: public java.util.List<GroupDetail> getGroupDetailList() {
          if (groupDetailList == null) {
              groupDetailList = new com.amazonaws.internal.SdkInternalList<GroupDetail>();
          }
          return groupDetailList;
      }
docs: <p>
  A list containing information about IAM groups.
  </p>
  
  @return A list containing information about IAM groups.