code: def test_return_indices(self, xp, dtype):
      a = xp.array([2, 3, 4, 1, 9, 4], dtype=dtype)
      b = xp.array([7, 5, 1, 2, 9, 3], dtype=dtype)
      return xp.intersect1d(a, b, return_indices=True)
  
imports: import warnings
  import numpy
  from cupy import testing
label_desc: Use image node_id 4 for calling the TestIntersect1d obj's underlying member method code with example usage: obj.test_return_indices(xp, dtype) and returns: xp