The first item, if the count parameter is 1 and the collection is not empty.
If the count parameter is not 1, then a collection of the first "count" items is returned (or less, if there aren't as many items as specified).
An object for silent failure, if there are no items in the collection.
Retrieve the first item in the collection, a collection of the first $count items in the collection, or an object for silent failure if the collection contains no items.
If this value is 1 (default), the first item is returned. Otherwise, the first “count” items in the collection are returned.