code: def getReverseRankMaps(self):
          
  
          reverseRankMaps = []
          for preference in self.preferences:
              reverseRankMaps.append(preference.getReverseRankMap())
          return reverseRankMaps
docs: Returns a list of dictionaries, one for each preference, that associates each position in
          the ranking with a list of integer representations of the candidates ranked at that 
          position and returns a list of the number of times each preference is given.