code: function currCb(res, isErr) {
        if (effectSettled) {
          return
        }
  
        effectSettled = true
        cb.cancel = noop // defensive measure
        if (sagaMonitor) {
          isErr ? sagaMonitor.effectRejected(effectId, res) : sagaMonitor.effectResolved(effectId, res)
        }
        cb(res, isErr)
      }
docs: Completion callback passed to the appropriate effect runner