docs: def exportPreflibFile(self, fileName):
          """
          Exports a preflib format file that contains all the information of the current Profile.
  
          :ivar str fileName: The name of the output file to be exported.
          """
  
          elecType = self.getElecType()
  
          if elecType != "soc" and elecType != "toc" and elecType != "soi" and elecType != "toi":
              print("ERROR: printing current type to preflib format is not supported")
              exit()
  
          # Generate a list of reverse rankMaps, one for each vote. This will allow us to easiliy
          # identify ties.
          reverseRankMaps = self.getReverseRankMaps()
  
          outfileObj = open(fileName, 'w')
  
          # Print the number of candidates and the integer representation and name of each candidate.
          outfileObj.write(str(self.numCands))
          for candInt, cand in self.candMap.items():
              outfileObj.write("\n" + str(candInt) + "," + cand)
  
          # Sum up the number of preferences that are represented.
          preferenceCount = 0
          for preference in self.preferences:
              preferenceCount += preference.count
  
          # Print the number of voters, the sum of vote count, and the number of unique orders.
          outfileObj.write("\n" + str(self.numVoters) + "," + str(preferenceCount) + "," + str(len(self.preferences)))
  
          for i in range(0, len(reverseRankMaps)):
  
              # First, print the number of times the preference appears.
              outfileObj.write("\n" + str(self.preferences[i].count))
              
              reverseRankMap = reverseRankMaps[i]
  
              # We sort the positions in increasing order and print the candidates at each position
              # in order.
              sortedKeys = sorted(reverseRankMap.keys())
              for key in sortedKeys:
  
                  cands = reverseRankMap[key]
  
                  # If only one candidate is in a particular position, we assume there is no tie.
                  if len(cands) == 1:
                      outfileObj.write("," + str(cands[0]))
  
                  # If more than one candidate is in a particular position, they are tied. We print
                  # brackets around the candidates.
                  elif len(cands) > 1:
                      outfileObj.write(",{" + str(cands[0]))
                      for j in range(1, len(cands)):
                          outfileObj.write("," + str(cands[j]))
                      outfileObj.write("}")
                      
          outfileObj.close()