class_docstr: Class implementing the MTG FCI L1c Filehandler.
  
  This class implements the Meteosat Third Generation (MTG) Flexible
  Combined Imager (FCI) Level-1c NetCDF reader.
  It is designed to be used through the :class:`~satpy.Scene`
  class using the :mod:`~satpy.Scene.load` method with the reader
  ``"fci_l1c_nc"``.
docstr: Initialize file handler.
docstr_tok: ["Initialize","file","handler","."]
code: def __init__(self, filename, filename_info, filetype_info):
      """Initialize file handler."""
      super().__init__(
          filename,
          filename_info,
          filetype_info,
          cache_var_size=0,
          cache_handle=True,
      )
      logger.debug("Reading: {}".format(self.filename))
      logger.debug("Start: {}".format(self.start_time))
      logger.debug("End: {}".format(self.end_time))
  
      self._cache = {}
  
imports: from __future__ import absolute_import, division, print_function, unicode_literals
  import logging
  from datetime import timedelta
  from functools import cached_property
  import dask.array
  import numpy
  import xarray
  from netCDF4 import default_fillvals
  from pyresample import geometry
  from satpy.readers._geos_area import get_geos_area_naming
  from satpy.readers.eum_base import get_service_mode
  from .netcdf_utils import NetCDF4FsspecFileHandler
label_desc: Use image node_id 1 to create a new FCIL1cNCFileHandler object from inherited base classes: NetCDF4FsspecFileHandler with example: obj = FCIL1cNCFileHandler(filename, filename_info, filetype_info)