class_docstr: Swap-in HDF5 File Handler.
code: def _num_cols_for_file_type(self):
      return (
          self.num_cols
          if "1000" in self.filetype_info["file_type"]
          else self.num_cols * 2
      )
  
imports: import os
  from unittest import mock
  import dask.array
  import numpy
  import pytest
  import xarray
  from satpy.tests.reader_tests.test_hdf5_utils import FakeHDF5FileHandler
label_desc: Use image node_id 8 for calling the FakeHDF5FileHandler2 obj's underlying member method code with example usage: obj._num_cols_for_file_type() and returns: unknown