Function isSome

isSome<T>(opt: Option.Option<T>): opt is Some<T>
Checks whether opt is Some.
Type Parameters
- T
Parameters
- opt: Option.Option<T>
  The optional value.
Returns opt is Some<T>
The proof that opt is a Some.

Examples
Example
```
expect(isSome(some(2))).toStrictEqual(true);
expect(isSome(none())).toStrictEqual(false);
```
- Defined in src/option.ts:121