export interface Comparable<T> {
    compareTo(o: T): number;
}
export interface Comparator<T> {
    compare(o1: T, o2: T): number;
    equals(o: Comparator<any>): boolean;
}
export declare class StringComparator implements Comparator<string> {
    compare(a: string, b: string): number;
    equals(o: Comparator<any>): boolean;
}
export declare class NumberComparator implements Comparator<string> {
    compare(a: string, b: string): number;
    equals(o: Comparator<any>): boolean;
}