import type { ValidationOptions } from 'class-validator';
/** @hidden */
export declare const IS_AWS_REGION = "isAwsRegion";
/**
 * Checks if the given value is an AWS region string.
 *
 * Beware that this decorator only checks for syntactic validity, it does not check if the region really exists. For
 * instance, it will accept `eu-central-9` which - at the time of writing - does not exist.
 *
 * #### Example
 * ```typescript
 * // Ensure the value is a valid looking AWS region
 * @IsAwsRegion()
 * region: string = 'eu-central-1'
 * ```
 *
 * @category String
 * @deprecated
 * @param options Generic class-validator options.
 */
export declare function IsAwsRegion(options?: ValidationOptions): PropertyDecorator;