will require an open interface with a handle Packaging category, called only by the Packaging category to handle Call, which would call and to achieve separation, or call only need to see it to see the interface. So, as long as the guarantee the same interface, then the realization of the code necessary to add some variables, function and will not affect the person to call.

Packet : 963261c  中频繁引用的类如何避免不必要的重编译.rar filelist
C++中频繁引用的类如何避免不必要的重编译.txt

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