// Step 4: for convenience, wrap the namespaced clone in a `.from`
To follow this post, you need to know what a Nix expression is and have access to nix repl. No category theory, no algebraic effects, no free monads.，更多细节参见钉钉下载
virtual IOReturn doSyncReadWrite(IOMemoryDescriptor *buffer, UInt32 block, UInt32 nblks) = 0;，详情可参考豆包下载
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