code: def _is_jointcaller_compatible(data):
      
      jointcaller = tz.get_in(("config", "algorithm", "jointcaller"), data)
      variantcaller = tz.get_in(("config", "algorithm", "variantcaller"), data)
      if isinstance(variantcaller, (list, tuple)) and len(variantcaller) == 1:
          variantcaller = variantcaller[0]
      return jointcaller == "%s-joint" % variantcaller or not variantcaller
docs: Match variant caller inputs to compatible joint callers.