code: def _create_lstm_args(xp, device, c_shape, x_shape, float_dtype):
      c = array_utils.create_dummy_ndarray(xp, c_shape, float_dtype[0])
      x = array_utils.create_dummy_ndarray(xp, x_shape, float_dtype[1])
      return c, x
  
imports: import unittest
  import chainer
  from chainer import functions
  import numpy
  import pytest
  import chainerx
  from chainerx_tests import array_utils
  from chainerx_tests import dtype_utils
  from chainerx_tests import op_utils
label_desc: Use image node_id 1 for calling a global function with example usage: _create_lstm_args(xp, device, c_shape, x_shape, float_dtype) and returns: c,  x