code: def Voicemail(self, Id):
          
          o = Voicemail(self, Id)
          o.Type # Test if such a voicemail exists.
          return o
docs: Queries the voicemail object.
  
          :Parameters:
            Id : int
              Voicemail Id.
  
          :return: A voicemail object.
          :rtype: `Voicemail`