code: def process_mutect_vcf(job, mutect_vcf, work_dir, univ_options):
      
      mutect_vcf = job.fileStore.readGlobalFile(mutect_vcf)
  
      with open(mutect_vcf, 'r') as infile, open(mutect_vcf + 'mutect_parsed.tmp', 'w') as outfile:
          for line in infile:
              line = line.strip()
              if line.startswith('#'):
                  print(line, file=outfile)
                  continue
              line = line.split('\t')
              if line[6] != 'REJECT':
                  print('\t'.join(line), file=outfile)
      return outfile.name
docs: Process the MuTect vcf for accepted calls.
  
      :param toil.fileStore.FileID mutect_vcf: fsID for a MuTect generated chromosome vcf
      :param str work_dir: Working directory
      :param dict univ_options: Dict of universal options used by almost all tools
      :return: Path to the processed vcf
      :rtype: str