code: func (r *Recurrence) GetUntilDateOk() (int, bool) {
  	if r == nil || r.UntilDate == nil {
  		return 0, false
  	}
  	return *r.UntilDate, true
  }
docs: // GetUntilDateOk returns a tuple with the UntilDate field if it's non-nil, zero value otherwise
  // and a boolean to check if the value has been set.