code: def run_strelka_with_merge(job, tumor_bam, normal_bam, univ_options, strelka_options):
      
      spawn = job.wrapJobFn(run_strelka, tumor_bam, normal_bam, univ_options,
                            strelka_options, split=False).encapsulate()
      job.addChild(spawn)
      return spawn.rv()
docs: A wrapper for the the entire strelka sub-graph.
  
      :param dict tumor_bam: Dict of bam and bai for tumor DNA-Seq
      :param dict normal_bam: Dict of bam and bai for normal DNA-Seq
      :param dict univ_options: Dict of universal options used by almost all tools
      :param dict strelka_options: Options specific to strelka
      :return: fsID to the merged strelka calls
      :rtype: toil.fileStore.FileID