'Representation method for new or updated value dicts.
IMPORTANT: This method *must not* change DB status because it
is called from inline forms before the the row is
committed to the DB, so any DB status change would
be invalid at this point.
To be implemented in subclass.
@param values: the values dict
@return: string representation for the values dict'

def represent(self, value):

    return s3_unicode(value)
