code: def _vcf_info(start, end, mate_id, info=None):
      
      out = "SVTYPE=BND;MATEID={mate};IMPRECISE;CIPOS=0,{size}".format(
          mate=mate_id, size=end-start)
      if info is not None:
          extra_info = ";".join("{0}={1}".format(k, v) for k, v in info.iteritems())
          out = "{0};{1}".format(out, extra_info)
      return out
docs: Return breakend information line with mate and imprecise location.