code: def unit(self, request):
      return request.param
  
imports: from datetime import timedelta
  import numpy
  import pytest
  import pandas
  from pandas import Timedelta
  import pandas._testing
  from pandas.core.arrays import DatetimeArray, TimedeltaArray
label_desc: Use image node_id 1 for calling the TestNonNano obj's underlying member method code with example usage: obj.unit(request) and returns: request