code: def _convert_slices(self, slices, device):
      # Converts advanced indexing slices (of numpy.ndarray) to respective
      # backend arrays.
      if isinstance(slices, list):
          return [self._convert_slices(a, device) for a in slices]
      if isinstance(slices, tuple):
          return tuple(
              [self._convert_slices(a, device) for a in slices]
          )
      if isinstance(slices, numpy.ndarray):
          return device.send(slices)
      return slices
  
imports: import unittest
  import numpy
  import chainer
  from chainer.backends import cuda
  from chainer import functions
  from chainer import gradient_check
  from chainer import testing
  from chainer.testing import attr
label_desc: Use image node_id 3 for calling the TestGetItemAdvanced obj's underlying member method code with example usage: obj._convert_slices(slices, device) and returns: slices, unknown, tuple, device