class_docstr: Test the get_dataset method.
code: def _get_dataset(fh):
      from satpy.tests.utils import make_dataid
  
      key = make_dataid(name="1", calibration="reflectance")
      info = {"name": "1", "standard_name": "my_standard_name"}
      res = fh.get_dataset(key=key, info=info)
      return key, res
  
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 3 for calling the TestGetDataset obj's underlying member method code with example usage: obj._get_dataset(fh) and returns: key,  res