class_docstr: File handler for Satpy's CF netCDF files.
docstr: Get start time.
docstr_tok: ["Get","start","time","."]
code: def start_time(self):
      """Get start time."""
      return self.filename_info["start_time"]
  
imports: import itertools
  import json
  import logging
  import xarray
  from pyresample import AreaDefinition
  from satpy.dataset.dataid import WavelengthRange
  from satpy.readers.file_handlers import BaseFileHandler
  from satpy.utils import get_legacy_chunk_size
label_desc: Use image node_id 2 for calling the SatpyCFFileHandler obj's underlying member method code with example usage: obj.start_time() and returns: self