func NewCronInput(name string, spec string) *pps.Input {
	return &pps.Input{
		Cron: &pps.CronInput{
			Name: name,
			Spec: spec,
		},
	}
}
func NewCronInput(name string, spec string) *pps.Input {
	return &pps.Input{
		Cron: &pps.CronInput{
			Name: name,
			Spec: spec,
		},
	}
}
// NewCronInput returns an input which will trigger based on a timed schedule.
// It uses cron syntax to specify the schedule. The input will be exposed to
// jobs as `/pfs/<name>/<timestamp>`. The timestamp uses the RFC 3339 format,
// e.g. `2006-01-02T15:04:05Z07:00`.