addSubunit
Declaration
virtual IOReturn addSubunit(IOFireWireAVCProtocolUserClient *userClient, IOFireWireAVCSubunitPlugHandlerCallback callBack, OSAsyncReference64 asyncRef, UInt32 subunitType, UInt32 numSourcePlugs, UInt32 numDestPlugs, uint64_t userCallBack, uint64_t userRefCon, UInt32 *subUnitID);