import { ValidationOptions } from '../ValidationOptions';
export declare const CONTAINS = "contains";
/**
 * Checks if the string contains the seed.
 * If given value is not a string, then it returns false.
 */
export declare function contains(value: unknown, seed: string): boolean;
/**
 * Checks if the string contains the seed.
 * If given value is not a string, then it returns false.
 */
export declare function Contains(seed: string, validationOptions?: ValidationOptions): PropertyDecorator;