class_docstr: NWCSAF MSG hdf5 reader.
class_docstr_tok: ["NWCSAF","MSG","hdf5","reader","."]
docstr: Return the start time of the object.
docstr_tok: ["Return","the","start","time","of","the","object","."]
code: def start_time(self):
      """Return the start time of the object."""
      return datetime.strptime(
          self.file_content["/attr/IMAGE_ACQUISITION_TIME"],
          "%Y%m%d%H%M",
      )
  
file_path: satpy/satpy/readers/nwcsaf_msg2013_hdf5.py
imports: import logging
  from datetime import datetime
  import h5py
  import numpy
  from pyresample.geometry import AreaDefinition
  from satpy.readers.hdf5_utils import HDF5FileHandler
label_desc: Use image node_id 4 for calling the Hdf5NWCSAF obj's underlying member method code with example usage: obj.start_time() and returns: datetime