code: def _get_loftee(data):
      
      ancestral_file = tz.get_in(("genome_resources", "variation", "ancestral"), data)
      if not ancestral_file or not os.path.exists(ancestral_file):
          ancestral_file = "false"
      vep = config_utils.get_program("vep", data["config"])
      args = ["--plugin", "LoF,human_ancestor_fa:%s,loftee_path:%s" %
              (ancestral_file, os.path.dirname(os.path.realpath(vep)))]
      return args
docs: Retrieve loss of function plugin parameters for LOFTEE.
      https://github.com/konradjk/loftee