code: def _create_timestamp():
      min_ts = pd.Timestamp.min
      max_ts = pd.Timestamp.max
      return np.random.randint(min_ts.timestamp(), max_ts.timestamp())
  
file_path: lightwood/tests/unit_tests/encoder/date/test_datetime.py
imports: import unittest
  from datetime import datetime
  import numpy
  import pandas
  import torch
  from lightwood.encoder.datetime.datetime import DatetimeEncoder
  from lightwood.encoder.datetime.datetime_sin_normalizer import DatetimeNormalizerEncoder
label_desc: Use image node_id 1 for calling the TestDatetimeEncoder obj's underlying member method code with example usage: obj._create_timestamp() and returns: np