code: def some_datetime(self):
      return datetime.datetime(1994, 1, 31, 10, 30, 00)
  
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 5 for calling the DatetimeOpsTestsMixin obj's underlying member method code with example usage: obj.some_datetime() and returns: datetime