code: def test_unique(self):
      # model ids are unique
      keys = sorted(m["id"] for m in MODEL_DESC)
      self.assertTrue(keys == sorted(set(keys)))
  
file_path: MONAI/tests/test_mmar_download.py
imports: from __future__ import annotations
  import os
  import tempfile
  import unittest
  from pathlib import Path
  import numpy
  import torch
  from parameterized import parameterized
  from monai import __version__
  from monai.apps import download_mmar, load_from_mmar
  from monai.apps.mmars import MODEL_DESC
  from monai.apps.mmars.mmars import _get_val
  from monai.utils import version_leq
  from tests.utils import skip_if_downloading_fails, skip_if_quick
label_desc: Use image node_id 3 for calling the TestMMMARDownload obj's underlying member method code with example usage: obj.test_unique() without return types