Add a check_validity method to ServiceBase
Add a check_validity method to ServiceBase

ratoaq2/subliminal,h3llrais3r/subliminal,Diaoul/subliminal,nvbn/subliminal,hpsbranco/subliminal,oxan/subliminal,t4lwh/subliminal,ravselj/subliminal,kbkailashbagaria/subliminal,juanmhidalgo/subliminal,fernandog/subliminal,getzze/subliminal,ofir123/subliminal,bogdal/subliminal,neo1691/subliminal,goll/subliminal,SickRage/subliminal,Elettronik/subliminal,pums974/subliminal