Type Alias Traversable<A>

Traversable: Functor<A> & {
    get isEmpty(): boolean;
    get size(): number;
    contains(value: A): boolean;
    foldLeft<B>(z: B): (op: (b: B, a: A) => B) => B;
    foldRight<B>(z: B): (op: (a: A, b: B) => B) => B;
    reduce(f: (b: A, a: A) => A): A;
    reduceRight(f: (b: A, a: A) => A): A;
}