isSetItem()function
isSetItem(set: ImmutableSet<T>, item: unknown): item is T
| Param | Type | |
|---|---|---|
set | ImmutableSet<T> | The set to look in. required |
item | unknown | The value to check for membership. required |
| Return | |
|---|---|
item is T | true if item exists in set, otherwise false. |
Is an unknown value an item in a set?