import type { Dict, Primitive } from '../type';
export declare class Collection {
    static unique<T extends Primitive>(array: T[]): T[];
    static unique<T extends Dict>(array: T[], primaryKey: string): T[];
    static merge<T extends Primitive>(arr1: T[], arr2: T[]): T[];
    static merge<T extends Dict>(arr1: T[], arr2: T[], primaryKey: string): T[];
}