Recurrence property
      
      Recurrence?
      get
      Recurrence
      
    
    
Implementation
complex.Recurrence? get Recurrence =>
    this.PropertyBag[AppointmentSchema.Recurrence] as complex.Recurrence?;complex.Recurrence? get Recurrence =>
    this.PropertyBag[AppointmentSchema.Recurrence] as complex.Recurrence?;