ItemStoreclass

new ItemStore<I, T>(collection: Collection<string, I, T>, id: I, provider: DBProvider<I>, memory?: MemoryDBProvider<I>)

Param	Type
`collection`	`Collection<string, I, T>`	The collection the item lives in. required
`id`	`I`	The ID of the item to track. required
`provider`	`DBProvider<I>`	The database provider to fetch the item from. required
`memory`	`MemoryDBProvider<I>`	Optional memory provider used to seed the initial value and drive realtime updates.

Return
`ItemStore<I, T>`	Store that fetches and tracks a single item by ID in a collection from a database provider.

Property	Type
`.provider`	`DBProvider<I>`	The database provider this store fetches its item from. required readonly
`.collection`	`Collection<string, I, T>`	The collection the item lives in. required readonly
`.id`	`I`	The ID of the item this store tracks. required readonly
`.item`	`Item<I, T>`	The required item data of this store. - Use this when the item is known to exist; use `value` when it may be `undefined`. required

Store that fetches and tracks a single item by ID in a collection from a database provider.

Holds an OptionalItem value: the item if it exists, or undefined if it doesn't.
Seeds from a MemoryDBProvider snapshot when available, and subscribes to realtime updates.

Examples

const store = new ItemStore(collection, "abc", provider);
 const item = await store; // OptionalItem<I, T>