toUndefinableFromOptionReturn T if input is Some(T). Otherwise, return undefined. function toUndefinableFromOption<T>(input: Option<T>): Undefinable<T>;§toUndefinableFromOption<T>(input: Option<T>): Undefinable<T>[src]§Type Parameters§T[src]§Parameters§input: Option<T>[src]§Return Type§Undefinable<T>[src]