Merge branch 'clh' into liuyang

mrDarker

2025-06-17 58b5bb07de4bcbf670db5ad79ff8b9bd7afc1e28

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