code: public void setUserDetailList(java.util.Collection<UserDetail> userDetailList) {
          if (userDetailList == null) {
              this.userDetailList = null;
              return;
          }
  
          this.userDetailList = new com.amazonaws.internal.SdkInternalList<UserDetail>(userDetailList);
      }
docs: <p>
  A list containing information about IAM users.
  </p>
  
  @param userDetailList
  A list containing information about IAM users.