code: def _counts_to_coverages(sample_data, counts_in_1x):
      
      if not counts_in_1x:
          return {None: None}
  
      return OrderedDict(
          (_count_to_coverage(x, counts_in_1x), _count_to_coverage(y, counts_in_1x))
          for x, y in sample_data.items()
      )
docs: If the user specified read length and genome size in the config,
          convert the raw counts/bases into the depth of coverage.