(self)
Returns a name for the cost item that's used in the logging messages.
Returns a name for the cost item that's used in the logging messages.
Returns a name for the cost item that s used in the logging messages .
def cost_item_name(self):
        """Returns a name for the cost item that's used in the logging messages.
        """
        raise NotImplementedError("you must implement cost_item_name")
def cost_item_name ( self ) : raise NotImplementedError ( "you must implement cost_item_name" )