code: def vcfutilsConsensus(outFile, vcfFile, id_, _, executor):
      
      executor.execute(
          'vcfutils.pl vcf2fq < %s | '
          'filter-fasta.py --fastq --quiet --saveAs fasta '
          '--idLambda \'lambda id: "%s"\' > %s' %
          (vcfFile, id_, outFile))
docs: Use vcftools to extract consensus FASTA.
  
      @param outFile: The C{str} name to write the output to.
      @param vcfFile: The C{str} name of the VCF file with the calls from
          the pileup.
      @param id_: The C{str} identifier to use in the resulting FASTA sequence.
      @param executor: An C{Executor} instance.