code: def ibis_sqlite_backend():
      try:
          import ibis
      except ImportError:
          yield None
      else:
          ibis.set_backend("sqlite")
          yield
          ibis.set_backend(None)
  
file_path: holoviews/holoviews/tests/conftest.py
imports: import contextlib
  import pytest
  from panel.tests.conftest import optional_markers, port, pytest_addoption, pytest_configure, server_cleanup
label_desc: Use image node_id 2 for calling a global function with example usage: ibis_sqlite_backend() without return types