If a wrapper function needs to record or take note of an action, or needs to query the pseudo database, it USES the pseudo_client_op function to perform an operation.
如果包装器函数需要记录一个动作，或者需要查询pseudo数据库，它将使用pseudo_client _ op函数来执行操作。
The action of "creating" a wrapper actually registers the appropriate existing wrapper for your chosen target.
“创建”包装器实际上就是为选择的目标注册适当的现有包装器。
These Action classes provide an interface to the application's Model layer, acting as a wrapper around the business logic.
这些action类为应用程序的model层提供了一个接口，充当围绕业务逻辑的包装器。
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