code: def teardown_method(self, method):
      # drop the vector database
      self.run_sql(f"DROP DATABASE {self.vector_database_name}")
  
imports: import tempfile
  import time
  from unittest.mock import patch
  import pandas
  import pytest
  from mindsdb_sql import parse_sql
  from mindsdb.interfaces.storage.db import KnowledgeBase
  from .executor_test_base import BaseExecutorTest
label_desc: Use image node_id 4 for calling the TestKnowledgeBase obj's underlying member method code with example usage: obj.teardown_method(method) without return types