@classmethod
def search_rec_name(cls, name, clause):
    return ['OR', (('product',) + tuple(clause[1:])), (('product_identifier',) + tuple(clause[1:]))]
@classmethod
def search_rec_name(cls, name, clause):
    return ['OR', (('product',) + tuple(clause[1:])), (('product_identifier',) + tuple(clause[1:]))]