void CL_Callback_v0::set( void(*)() function); void CL_Callback_v0::set( void(*)(UserData) function, const UserData & user_data); void CL_Callback_v0::set( InstanceClass * instance, void(InstanceClass::*)() function); void CL_Callback_v0::set( InstanceClass * instance, void(InstanceClass::*)(UserData) function, const UserData & user_data);