code: def numModels(self, swarmId=None, includeHidden=False):
      
      # Count all models
      if includeHidden:
        if swarmId is None:
          return len(self._allResults)
  
        else:
          return len(self._swarmIdToIndexes.get(swarmId, []))
      # Only count non-hidden models
      else:
        if swarmId is None:
          entries = self._allResults
        else:
          entries = [self._allResults[entryIdx]
                     for entryIdx in self._swarmIdToIndexes.get(swarmId,[])]
  
        return len([entry for entry in entries if not entry['hidden']])
docs: Return the total # of models we have in our database (if swarmId is
      None) or in a specific swarm.
  
      Parameters:
      ---------------------------------------------------------------------
      swarmId:        A string representation of the sorted list of encoders
                      in this swarm. For example '__address_encoder.__gym_encoder'
      includeHidden:  If False, this will only return the number of models
                      that are not hidden (i.e. orphanned, etc.)
      retval:  numModels