The caller fetches the current state of the item from the repository and creates an in-memory working copy based on the state retrieved.
调用者从存储库中获取该项的当前状态，并基于检索到的状态创建一个内存中的工作副本。
The caller fetches the current state of the item from the repository and creates an in-memory working copy based on the state retrieved.
调用者从存储库中获取该项的当前状态，并基于检索到的状态创建一个内存中的工作副本。
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