+ @Happens_before:
+ Publish -> Fetch
+ Consume -> Prepare
+ @Commutativity: Prepare <-> Prepare: _Method1.__RET__ !=
+ _Method2.__RET__ || !_Method1.__RET__ || !_Method2.__RET__
+ @Commutativity: Prepare <-> Publish: _Method1.__RET__ != _Method2.bin ||
+ !_Method1.__RET__
+ @Commutativity: Prepare <-> Fetch: _Method1.__RET__ != _Method2.__RET__
+ || !_Method1.__RET__ || !_Method2.__RET__
+ @Commutativity: Prepare <-> Consume : _Method1.__RET__ != _Method2.bin || !_Method1.__RET__
+
+ @Commutativity: Publish <-> Publish: _Method1.bin != _Method2.bin
+ @Commutativity: Publish <-> Fetch: _Method1.bin != _Method2.__RET__ ||
+ !_Method2.__RET__
+ @Commutativity: Publish <-> Consume : _Method1.bin != _Method2.bin
+
+ @Commutativity: Fetch <-> Fetch: _Method1.__RET__ != _Method2.__RET__ ||
+ !_Method1.__RET__ || !_Method2.__RET__
+ @Commutativity: Fetch <-> Consume : _Method1.__RET__ != _Method2.bin || !_Method1.__RET__
+
+ @Commutativity: Consume <-> Consume : _Method1.bin != _Method2.bin
+