import { ClassValidationDecorator } from './class.decorator';
/**
 * Allows validating at least one key group exists
 */
export declare function ValidateAtLeastOneKeyGroupExists(groups: string[][]): ClassValidationDecorator;
/**
 * Allows validating only one key group exists
 */
export declare function ValidateOnlyOneKeyGroupExists(groups: string[][]): ClassValidationDecorator;