-=attr last_modification_time
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-Date and time when the entry was last modified.
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-=attr creation_time
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-Date and time when the entry was created.
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-=attr last_access_time
-
-Date and time when the entry was last accessed.
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-=attr expiry_time
-
-Date and time when the entry expired or will expire.
-
-=attr expires
-
-Boolean value indicating whether or not an entry is expired.
-
-=attr usage_count
-
-TODO
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-=attr location_changed
-
-Date and time when the entry was last moved to a different parent group.
-