import { type PipeTransform } from '@angular/core';
import * as i0 from "@angular/core";
/**
 * This pipe is a wrapper around the [Intl.supportedValuesOf](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Intl/supportedValuesOf) method.
 *
 * @returns An array containing the supported calendar, collation, currency, numbering systems, or unit values supported by the implementation.
 */
export declare class SupportedValuesOf implements PipeTransform {
    /**
     * Transforms a key into an array containing the supported calendar, collation, currency, numbering systems, or unit values supported by the implementation.
     *
     * @param key A key string indicating the category of values to be returned. This is one of: "calendar", "collation", "currency","numberingSystem", "timeZone", "unit"
     * @returns An array containing the supported values for the key or an empty array if the input is invalid.
     */
    transform(key: 'calendar' | 'collation' | 'currency' | 'numberingSystem' | 'timeZone' | 'unit'): string[];
    static ɵfac: i0.ɵɵFactoryDeclaration<SupportedValuesOf, never>;
    static ɵpipe: i0.ɵɵPipeDeclaration<SupportedValuesOf, "supportedValuesOf", true>;
}