export declare type Comparator = <A, B>(_: A) => Predicate<B>;
export declare type ComparatorProducer = (_: Comparator) => Comparator;
export declare type Predicate<A> = (_: A) => boolean;
export declare type PredicateProducer = <A>(_: Predicate<A>) => Predicate<A>;
export interface UntypedObjectCollection {
    [prop: string]: any | undefined;
}
export interface ObjectCollection<T> {
    [prop: string]: T;
}
export interface ObjectMap<T> {
    [prop: string]: T;
}
export declare type ObjectSet = UntypedObjectCollection;
export declare type Pair<A> = [A, A];
export declare type Either<T1, T2> = [T1, undefined] | [undefined, T2];
export declare type NestedArray<T> = Array<Array<T>>;
export declare type ArrayList<T> = Array<T>;
export declare type ArraySet<T> = Array<T>;
export declare type ObjectStruct = Object;