code: public BatchUpdateUserRequest withUpdateUserRequestItems(UpdateUserRequestItem... updateUserRequestItems) {
          if (this.updateUserRequestItems == null) {
              setUpdateUserRequestItems(new java.util.ArrayList<UpdateUserRequestItem>(updateUserRequestItems.length));
          }
          for (UpdateUserRequestItem ele : updateUserRequestItems) {
              this.updateUserRequestItems.add(ele);
          }
          return this;
      }
docs: <p>
  The request containing the user IDs and details to update.
  </p>
  <p>
  <b>NOTE:</b> This method appends the values to the existing list (if any). Use
  {@link #setUpdateUserRequestItems(java.util.Collection)} or
  {@link #withUpdateUserRequestItems(java.util.Collection)} if you want to override the existing values.
  </p>
  
  @param updateUserRequestItems
  The request containing the user IDs and details to update.
  @return Returns a reference to this object so that method calls can be chained together.