code: def _get_input_args(bam_file, data, out_base, background):
      
      if dd.get_genome_build(data) in ["hg19"]:
          return ["--PileupFile", _create_pileup(bam_file, data, out_base, background)]
      else:
          return ["--BamFile", bam_file]
docs: Retrieve input args, depending on genome build.
  
      VerifyBamID2 only handles GRCh37 (1, 2, 3) not hg19, so need to generate
      a pileup for hg19 and fix chromosome naming.