docs: def hgmd(self):
          """Hi Index """
  
          # calculate time thread took to finish
          # logging.info('Starting HI score')
          tstart = datetime.now()
  
  
          if os.path.isfile(settings.hgmd_file): 
  
              hgmd_obj = hgmd.HGMD(self.vcf_file)
              hgmd_obj.run()
  
          tend = datetime.now()
          execution_time = tend - tstart