code: def forward_xp(self, inputs, xp):
      (a,) = inputs
      b = xp.logical_not(a)
      return (b,)
  
imports: import chainer
  import numpy
  import pytest
  import chainerx
  import chainerx.testing
  from chainerx_tests import array_utils
  from chainerx_tests import dtype_utils
  from chainerx_tests import op_utils
label_desc: Use image node_id 2 for calling the TestLogicalNot obj's underlying member method code with example usage: obj.forward_xp(inputs, xp) and returns: b