docs: def _get(relative_path, genome=None):
      """
      :param relative_path: relative path of the file inside the repository
      :param genome: genome name. Can contain chromosome name after comma, like hg19-chr20,
                     in case of BED, the returning BedTool will be with added filter.
      :return: BedTools object if it's a BED file, or filepath
      """
      chrom = None
      if genome:
          if '-chr' in genome:
              genome, chrom = genome.split('-')
          check_genome(genome)
          relative_path = relative_path.format(genome=genome)
  
      path = abspath(join(dirname(__file__), relative_path))
      if not isfile(path) and isfile(path + '.gz'):
          path += '.gz'
  
      if path.endswith('.bed') or path.endswith('.bed.gz'):
          if path.endswith('.bed.gz'):
              bedtools = which('bedtools')
              if not bedtools:
                  critical('bedtools not found in PATH: ' + str(os.environ['PATH']))
              debug('BED is compressed, creating BedTool')
              bed = BedTool(path)
          else:
              debug('BED is uncompressed, creating BedTool')
              bed = BedTool(path)
  
          if chrom:
              debug('Filtering BEDTool for chrom ' + chrom)
              bed = bed.filter(lambda r: r.chrom == chrom)
          return bed
      else:
          return path