code: def isolated_query_patch(cls, query_str: str = None) -> str:
      if query_str is not None:
          return f'(run.testcase == "{full_class_name(cls)}") and ({query_str})'
      else:
          return f'(run.testcase == "{full_class_name(cls)}")'
  
imports: import unittest
  from fastapi.testclient import TestClient
  from tests.utils import truncate_api_db, full_class_name, fill_up_test_data
  from aim.sdk.repo import Repo
  from aim.sdk.run import Run
  from aim.web.run import app
label_desc: Use image node_id 4 for calling the TestBase obj's underlying member method code with example usage: obj.isolated_query_patch(cls, query_str) and returns: str, full_class_name, str, query_str, str, str, full_class_name, str