code: def test_handle_soft_device_variable(*, dtype_and_x, backend_fw):
      dtype, x = dtype_and_x
      dtype = dtype[0]
      with BackendHandler.update_backend(backend_fw) as ivy_backend:
          x = ivy_backend.to_device(x[0], "cpu")
  
          def fn(x, y):
              return ivy_backend.add(x, y)
  
          for device in _get_possible_devices():
              ivy_backend.set_default_device(device)
              out = ivy_backend.handle_soft_device_variable(
                  x, fn=fn, y=x
              )
  
              # check if device shifting is successful
              assert out.device == ivy_backend.default_device()
  
imports: import io
  import multiprocessing
  import os
  import re
  import shutil
  import sys
  import warnings
  import numpy
  import psutil
  import subprocess
  from hypothesis import strategies, assume
  import ivy
  import ivy_tests.test_ivy.helpers
  import ivy_tests.test_ivy.helpers.globals
  from ivy_tests.test_ivy.helpers import handle_test, BackendHandler
label_desc: Use image node_id 19 for calling a global function with example usage: test_handle_soft_device_variable() and returns: ivy_backend