import { Candidate } from './types';
export declare const checkCyclicReference: (arr: Candidate[]) => void;
export declare const checkNodeCycle: (map: Map<string, Candidate>, visit: Map<string, boolean>, start: string) => void;
export declare const checkDepNotfound: (arr: Candidate[]) => void;
export declare const checkSelfReference: (arr: Candidate[]) => void;
export declare const checkKeyDuplicates: (arr: Candidate[]) => void;
export declare const duplicateKeys: (arr: Candidate[]) => string[];
export declare const selfReference: (a: Candidate) => boolean;
export declare const crossReference: (a: Candidate, b: Candidate) => boolean;
export declare const subsets: (arr: any[], n: number) => any[][];