code: public java.util.List<String> getGroupList() {
          if (groupList == null) {
              groupList = new com.amazonaws.internal.SdkInternalList<String>();
          }
          return groupList;
      }
docs: <p>
  A list of IAM groups that the user is in.
  </p>
  
  @return A list of IAM groups that the user is in.