code: def test_get_device_count_native():
      backend = chainerx.get_global_default_context().get_backend(
          "native"
      )
      assert backend.get_device_count() > 0
  
file_path: chainer/tests/chainerx_tests/unit_tests/test_backend.py
imports: import pytest
  import chainerx
label_desc: Use image node_id 3 for calling a global function with example usage: test_get_device_count_native() without return types