code: def _check_backend_versions():
      """Issue warning if backend versions do not match."""
      if not _backend_versions_match():
          warnings.warn(
              "Backend version mismatch. Compression might fail or be ignored "
              "silently. Recommended: All versions below or above "
              "netCDF4-1.6.0/libnetcdf-4.9.0/xarray-2022.12.0.",
              stacklevel=3,
          )
  
file_path: satpy/satpy/writers/cf_writer.py
imports: import copy
  import logging
  import warnings
  import numpy
  import xarray
  from packaging.version import Version
  from satpy.cf.coords import EPOCH
  from satpy.writers import Writer
label_desc: Use image node_id 3 for calling a global function with example usage: _check_backend_versions() without return types