class_docstr: Writer class of fake ici level1b data.
class_docstr_tok: ["Writer","class","of","fake","ici","level1b","data","."]
docstr: Write the quality group.
docstr_tok: ["Write","the","quality","group","."]
code: def _write_quality_group(dataset):
      """Write the quality group."""
      group = dataset.createGroup("quality")
      group.overall_quality_flag = 0
      duration_of_product = group.createVariable(
          "duration_of_product", "f4"
      )
      duration_of_product[:] = 1000.0
  
imports: from datetime import datetime
  from unittest.mock import patch
  import numpy
  import pytest
  import xarray
  from netCDF4 import Dataset
  from satpy.readers.ici_l1b_nc import IciL1bNCFileHandler, InterpolationType
label_desc: Use image node_id 4 for calling the IciL1bFakeFileWriter obj's underlying member method code with example usage: obj._write_quality_group(dataset) without return types