technologies or systems that are purchased the billing system mediation system so you don't want to say now ok let's draw billing out of the portfolio and do our own billing you don't do that but if you are consuming data from be linked and you want to create micro service that is not real micro service bye-bye we can officially path you want to go as closest to the data as possible and then provide your own business rules again business rules exposed to our standard business rule solution and then expose this to the outer layer but if