Always show this item.
The item description
The item detail
Defaults to QuickPickItemKind.Default. If set to {@link QUickPickItemKind.Separator}, the item will not be displayed as a row but only as a separator, and all fields other than label will be ignored.
The item label
Used for QuickPickOptions.canPickMany not implemented yet
Represents an item that can be selected from a list of items.