class_docstr: Test the GACLAC file handler.
docstr: Create a file handler.
code: def _get_fh(
      self,
      filename="NSS.GHRR.NG.D88002.S0614.E0807.B0670506.WI",
      **kwargs,
  ):
      """Create a file handler."""
      from trollsift import parse
  
      filename_info = parse(GAC_PATTERN, filename)
      return self.GACLACFile(filename, filename_info, {}, **kwargs)
  
imports: from datetime import datetime
  from unittest import TestCase, mock
  import dask.array
  import numpy
  import pytest
  import xarray
label_desc: Use image node_id 1 for calling the TestGACLACFile obj's underlying member method code with example usage: obj._get_fh(filename) and returns: self