code: def test_3_get_tables(self):
      tbls = self.handler.get_tables()
      assert isinstance(tbls, list)
  
file_path: mindsdb/mindsdb/integrations/handlers/supabase_handler/tests/test_supabase_handler.py
imports: import unittest
  from mindsdb.integrations.handlers.supabase_handler.supabase_handler import SupabaseHandler
label_desc: Use image node_id 5 for calling the SupabaseHandlerTest obj's underlying member method code with example usage: obj.test_3_get_tables() without return types