code: func (wp *WorkerPool) Job(name string, fn interface{}) *WorkerPool {
  	return wp.JobWithOptions(name, JobOptions{}, fn)
  }
docs: // Job registers the job name to the specified handler fn. For instance, when workers pull jobs from the name queue they'll be processed by the specified handler function.
  // fn can take one of these forms:
  // (*ContextType).func(*Job) error, (ContextType matches the type of ctx specified when creating a pool)
  // func(*Job) error, for the generic handler format.