code: def _test_round_int64(self, xp):
      a = xp.array([-(2**62), 2**62], dtype=xp.int64)
      return a.round(self.decimals)
  
file_path: cupy/tests/cupy_tests/core_tests/test_ndarray_math.py
imports: import unittest
  import numpy
  from cupy import testing
label_desc: Use image node_id 1 for calling the TestRoundMinMax obj's underlying member method code with example usage: obj._test_round_int64(xp) and returns: a