code: def test_trimcoef_diff_types(self, xp, dtype1, dtype2):
      a = xp.array([1, 2, 0, 3, 0], dtype1)
      return xp.polynomial.polyutils.trimcoef(a, dtype2(self.tol))
  
imports: import unittest
  import numpy
  import pytest
  import cupy
  from cupy import testing
label_desc: Use image node_id 3 for calling the TestTrimcoef obj's underlying member method code with example usage: obj.test_trimcoef_diff_types(xp, dtype1, dtype2) and returns: xp