code: def setup_datafind_from_pregenerated_lcf_files(cp, ifos, outputDir, tags=None):
      
      if tags is None:
          tags = []
  
      datafindcaches = []
      for ifo in ifos:
          search_string = "datafind-pregenerated-cache-file-%s" %(ifo.lower(),)
          frame_cache_file_name = cp.get_opt_tags("workflow-datafind",
                                                  search_string, tags=tags)
          curr_cache = lal.Cache.fromfilenames([frame_cache_file_name],
                                               coltype=lal.LIGOTimeGPS)
          curr_cache.ifo = ifo
          datafindcaches.append(curr_cache)
      datafindouts = convert_cachelist_to_filelist(datafindcaches)
  
      return datafindcaches, datafindouts
docs: This function is used if you want to run with pregenerated lcf frame
      cache files.
  
      Parameters
      -----------
      cp : ConfigParser.ConfigParser instance
          This contains a representation of the information stored within the
          workflow configuration files
      ifos : list of ifo strings
          List of ifos to get pregenerated files for.
      outputDir : path
          All output files written by datafind processes will be written to this
          directory. Currently this sub-module writes no output.
      tags : list of strings, optional (default=None)
          Use this to specify tags. This can be used if this module is being
          called more than once to give call specific configuration (by setting
          options in [workflow-datafind-${TAG}] rather than [workflow-datafind]).
          This is also used to tag the Files returned by the class to uniqueify
          the Files and uniqueify the actual filename.
  
      Returns
      --------
      datafindcaches : list of glue.lal.Cache instances
         The glue.lal.Cache representations of the various calls to the datafind
         server and the returned frame files.
      datafindOuts : pycbc.workflow.core.FileList
          List of all the datafind output files for use later in the pipeline.