void removePowerClient( const OSSymbol * client );
uint32_t getPowerStateForClient( const OSSymbol * client );
IOReturn requestPowerState( const OSSymbol * client, uint32_t state );
void removePowerClient( const OSSymbol * client );
uint32_t getPowerStateForClient( const OSSymbol * client );
IOReturn requestPowerState( const OSSymbol * client, uint32_t state );