Function isNone

isNone<A>(option: Option<A>): option is Readonly<{ isSome: false }>
Type guard that checks if an Option is None.
Type Parameters
- A
Parameters
- option: Option<A>
  The Option to check
Returns option is Readonly<{ isSome: false }>
true if the Option is None, false if it is Some<A>
- Defined in packages/util-ts/src/lib/functional/option.ts:69