code: func (ps *ParallelState) WithRetriers(retries ...*TaskRetry) *ParallelState {
  	if ps.Retriers == nil {
  		ps.Retriers = make([]*TaskRetry, 0)
  	}
  	ps.Retriers = append(ps.Retriers, retries...)
  	return ps
  }
docs: // WithRetriers is the fluent builder for TaskState