code: def _check_filehandler_area_def(file_handler, dsid):
      from pyproj import CRS
  
      area_definition = file_handler.get_area_def(dsid)
  
      expected_crs = CRS(PROJ["gdal_projection"])
      assert area_definition.crs == expected_crs
  
      correct_extent = (
          PROJ["gdal_xgeo_up_left"],
          PROJ["gdal_ygeo_low_right"],
          PROJ["gdal_xgeo_low_right"],
          PROJ["gdal_ygeo_up_left"],
      )
      assert area_definition.area_extent == correct_extent
  
imports: import h5netcdf
  import numpy
  import pytest
  import xarray
  from satpy.readers.nwcsaf_nc import NcNWCSAF, read_nwcsaf_time
label_desc: Use image node_id 19 for calling a global function with example usage: _check_filehandler_area_def(file_handler, dsid) without return types