Merge branch 'clh' into liuyang

mrDarker

2025-06-26 da96e6da0b677c6a4e96308aaecd3d619a8e4db2

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#pragma once
 
class IObserver
{
public:
    virtual void setPriority(int nPriority) = 0;
    virtual void subscribe() = 0;
    virtual void unsubscribe() = 0;
};