This is xnu-8019. See this file in:
__ZN13SEPHibernator23_RESERVEDSEPHibernator0Ev
__ZN13SEPHibernator23_RESERVEDSEPHibernator1Ev
__ZN13SEPHibernator23_RESERVEDSEPHibernator2Ev
__ZN13SEPHibernator23_RESERVEDSEPHibernator3Ev
__ZN13SEPHibernator23_RESERVEDSEPHibernator4Ev
__ZN13SEPHibernator23_RESERVEDSEPHibernator5Ev
__ZN13SEPHibernator23_RESERVEDSEPHibernator6Ev
__ZN13SEPHibernator23_RESERVEDSEPHibernator7Ev