code: def test_mul_preserves_reso(self, td, unit):
      # The td fixture should always be far from the implementation
      #  bound, so doubling does not risk overflow.
      res = td * 2
      assert res._value == td._value * 2
      assert res._creso == unit
  
imports: from datetime import timedelta
  import sys
  from hypothesis import given, strategies
  import numpy
  import pytest
  from pandas._libs import lib
  from pandas._libs.tslibs import NaT, iNaT
  from pandas._libs.tslibs.dtypes import NpyDatetimeUnit
  from pandas.errors import OutOfBoundsTimedelta
  from pandas import Timedelta, to_timedelta
  import pandas._testing
label_desc: Use image node_id 8 for calling the TestNonNano obj's underlying member method code with example usage: obj.test_mul_preserves_reso(td, unit) without return types