code: def test_6_describe_table(self):
      described = self.handler.get_columns("dt_test")
      assert isinstance(described, 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 7 for calling the SupabaseHandlerTest obj's underlying member method code with example usage: obj.test_6_describe_table() without return types