The client code specifies (in the constructor) the file path or the File which is to hold the persisted registration repository. Note that any public method that modifies any part of the DOM for the repository also flushes the repository to the file before returning.
If the specified file exists, the manager loads its contents as the initial value of the document. If the file does not exist, the manager creates a new in-memory document containing the top-level registry element and the default registrationstatus element but does NOT write out this initial data. Writes to the file occur only in response to the client code invoking one of the methods that modifies the DOM.
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