code: def setUpClass(cls):
      super(DatetimeOpsTests, cls).setUpClass()
      cls.spark.conf.set("spark.sql.timestampType", "timestamp_ntz")
  
imports: import datetime
  import pandas
  from pandas.api.types import CategoricalDtype
  from pyspark import pandas
  from pyspark.testing.pandasutils import PandasOnSparkTestCase
  from pyspark.pandas.tests.data_type_ops.testing_utils import OpsTestBase
label_desc: Use image node_id 1 for calling the DatetimeNTZOpsTest obj's underlying member method code with example usage: obj.setUpClass(cls) without return types