type alias Deno.KvEntryMaybeUnstableAn optional versioned pair of key and value in a Deno.Kv. This is the same as a KvEntry, but the value and versionstamp fields may be null if no value exists for the given key in the KV store. Type ParametersTdefinition: KvEntry<T> | { key: KvKey; value: null; versionstamp: null; }