Returns whether the store contains the given key.
Returns the stored value for the given key or null if not found.
key or null for null result
Returns the data store factory.
Returns the data store ID.
Returns whether there are any stored keys.
Returns the unmodifiable set of all stored keys.
Order of the keys is not specified.
Returns the number of stored keys.
Returns the unmodifiable collection of all stored values.
Deletes all of the stored keys and values.