Cleanable
Indicates a module may contain sensitive user data and should be cleaned on logout.
Types of data that should be cleaned: - Persistent data (disk) that may contain user information or content. - Retained (static) in-memory data that may contain user info or content.
Note that the following types of modules do not need to be cleaned here: - Modules whose user data is kept in memory in non-static fields, assuming the app uses a separate instance for each viewer context. - Modules that remove all persistent data (temp files, etc) when the catalyst instance is destroyed. This is because logout implies that the instance is destroyed. Apps should enforce this.