code: def _massageData(self, row):
  
          
          offset = 0
          resultBits = []
  
          for i, tableClass in enumerate(self.tableClass):
              numAttrs = self.schemaLengths[i]
  
              result = self.store._loadedItem(self.tableClass[i],
                                              row[offset],
                                              row[offset+1:offset+numAttrs])
              assert result.store is not None, "result %r has funky store" % (result,)
              resultBits.append(result)
  
              offset += numAttrs
  
          return tuple(resultBits)
docs: Convert a row into a tuple of Item instances, by slicing it
          according to the number of columns for each instance, and then
          proceeding as for ItemQuery._massageData.
  
          @param row: an n-tuple, where n is the total number of columns
          specified by all the item types in this query.
  
          @return: a tuple of instances of the types specified by this query.