docs: public CreateNotebookInstanceLifecycleConfigRequest withOnStart(NotebookInstanceLifecycleHook... onStart) {
          if (this.onStart == null) {
              setOnStart(new java.util.ArrayList<NotebookInstanceLifecycleHook>(onStart.length));
          }
          for (NotebookInstanceLifecycleHook ele : onStart) {
              this.onStart.add(ele);
          }
          return this;
      }