+ ('cpp:identifier', 's4u_Actor'),
+ ('cpp:identifier', 's4u_Barrier'),
+ ('cpp:identifier', 's4u_ConditionVariable'),
+ ('cpp:identifier', 's4u_Host'),
+ ('cpp:identifier', 's4u_NetZone'),
+ ('cpp:identifier', 's4u_Mutex'),
+ ('cpp:identifier', 's4u_Link'),
+ ('cpp:identifier', 's4u_Semaphore'),
+ ('cpp:identifier', 's4u_VirtualMachine'),
+ ('cpp:identifier', 's4u_VM'),