code: def test_gray_scale_name_exists(self):
      assert hasattr(self.to_grayscale_instance, "name")
  
file_path: evadb/test/integration_tests/long/functions/ndarray/test_to_grayscale.py
imports: import unittest
  from pathlib import Path
  from test.util import file_remove
  import numpy
  import pandas
  from evadb.configuration.constants import EvaDB_ROOT_DIR
  from evadb.functions.ndarray.to_grayscale import ToGrayscale
  from evadb.utils.generic_utils import try_to_import_cv2
label_desc: Use image node_id 2 for calling the ToGrayscaleTests obj's underlying member method code with example usage: obj.test_gray_scale_name_exists() without return types