code: def _write_vcf_breakend(brend, out_handle):
      
      out_handle.write("{0}\n".format("\t".join(str(x) for x in
          [brend.chrom, brend.pos + 1, brend.id, brend.ref, brend.alt,
           ".", "PASS", brend.info])))
docs: Write out a single VCF line with breakpoint information.