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Represent an actual message that can be stored in any of the supported
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Prepare the message for serialization by forcing the ``message``
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This is the base backend for temporary message storage.
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Return a list of loaded messages, retrieving them first if they have
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Retrieve a list of stored messages. Return a tuple of the messages
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Store a list of messages and return a list of any messages which could
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Prepare a list of messages for storage.
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Store all unread messages.
If the backend has yet to be iterated, store previously stored messages
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Queue a message to be stored.
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Return the minimum recorded level.
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Set a custom minimum recorded level.
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