code: def prepare_sample(data):
      
      data = utils.to_single_data(data)
      logger.debug("Preparing %s" % data["rgnames"]["sample"])
      data["files"] = get_fastq_files(data)
      # get_fastq_files swaps over quality scores to standard, unless trimming
      if not(dd.get_trim_reads(data)):
          data = dd.set_quality_format(data, "standard")
      return [[data]]
docs: Prepare a sample to be run, potentially converting from BAM to
      FASTQ and/or downsampling the number of reads for a test run