code: def test_setdiff1d_diff_elements(self, xp, dtype):
      x = xp.array([3, 4, 9, 1, 5, 4], dtype=dtype)
      y = xp.array([8, 7, 3, 9, 0], dtype=dtype)
      return xp.setdiff1d(x, y, assume_unique=True)
  
imports: import warnings
  import numpy
  from cupy import testing
label_desc: Use image node_id 3 for calling the TestSetdiff1d obj's underlying member method code with example usage: obj.test_setdiff1d_diff_elements(xp, dtype) and returns: xp