focusOn(value)
ts
function focusOn<T>(value: T): DataOptic<T, {}, T>;function focusOn<T>(): PureOptic<T, {}, T>;
ts
function focusOn<T>(value: T): DataOptic<T, {}, T>;function focusOn<T>(): PureOptic<T, {}, T>;
Focus on a value to return a DataOptic
.