code: def test_quantile_q_list(self, xp, dtype, method):
      a = testing.shaped_arange((1001,), xp, dtype)
      q = [0.99, 0.999]
      return xp.quantile(a, q, method=method)
  
imports: import warnings
  import numpy
  import pytest
  import cupy
  import cupy._core._accelerator
  from cupy import cuda
  from cupy import testing
label_desc: Use image node_id 13 for calling the TestQuantileMethods obj's underlying member method code with example usage: obj.test_quantile_q_list(xp, dtype, method) and returns: xp