lensO<A, B> function
Implementation
OptionLens<A, B> lensO<A, B>(Function1<A, Option<B>> getter, Function2<A, B, Option<A>> setter) => new OptionLens(getter, setter);
OptionLens<A, B> lensO<A, B>(Function1<A, Option<B>> getter, Function2<A, B, Option<A>> setter) => new OptionLens(getter, setter);