func (r *Recurrence) GetPeriod() int {
	if r == nil || r.Period == nil {
		return 0
	}
	return *r.Period
}
func (r *Recurrence) GetPeriod() int {
	if r == nil || r.Period == nil {
		return 0
	}
	return *r.Period
}
// GetPeriod returns the Period field if non-nil, zero value otherwise.