code: def extractValue(self, model, item):
          
          factory = super(FactoryColumn, self).extractValue(model, item)
          return factory.__class__.__name__.decode('ascii')
docs: Get the class name of the factory referenced by a port.
  
          @param model: Either a TabularDataModel or a ScrollableView, depending
          on what this column is part of.
  
          @param item: A port item instance (as defined by L{xmantissa.port}).
  
          @rtype: C{unicode}
          @return: The name of the class of the item to which this column's
          attribute refers.