This is xnu-8019. See this file in:
Directory listing for xnu-8019//iokit/IOKit/pwr_mgt
IOPM.h
IOPMLibDefs.h
IOPMPowerSource.h
IOPMPowerSourceList.h
IOPMPrivate.h
IOPMinformee.h
IOPMinformeeList.h
IOPMlog.h
IOPMpowerState.h
IOPowerConnection.h
Makefile
RootDomain.h