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class FileSystem

{

public:

static FileSystem& instance()

{

if (instance_ == NULL) instance_ = new FileSystem();

return *instance_;

}

private:

FileSystem() {}

static FileSystem* instance_;

};







class FileSystem

{

public:

static FileSystem*ย instance()

{

if (instance_ == NULL) instance_ = new FileSystem();

return instance_;

}

private:

FileSystem() {}

static FileSystem* instance_;

};