void CL_Callback_2< RetVal, P2 P2 >::set( RetVal(*)(P1, P2) function); void CL_Callback_2< RetVal, P2 P2 >::set( RetVal(*)(P1, P2, UserData) function, const UserData & user_data); void CL_Callback_2< RetVal, P2 P2 >::set( InstanceClass * instance, RetVal(InstanceClass::*)(P1, P2) function); void CL_Callback_2< RetVal, P2 P2 >::set( InstanceClass * instance, RetVal(InstanceClass::*)(P1, P2, UserData) function, const UserData & user_data);