import { LitElement } from 'lit';
/**
 * This decorator stores the i18n strings in a private variable __i18n.
 * Due to TypeScript decorators being dynamic a type cast is needed here.
 */
declare type I18nElement = LitElement & {
    __i18n: Record<string, unknown>;
    __i18nKey: string;
};
/**
 * A property decorator which accesses a set of string values for use
 * inside the element's template. The values can be overridden at runtime
 * by changing the property value that's reflected through the attribute value.
 *
 * @example
 *
 *     class MyElement {
 *       @i18n()
 *       i18n = {
 *         "open" : "Open my element",
 *         "close" : "Close my element"
 *       };
 *     }
 *
 */
export declare function i18n(): (protoOrDescriptor: any, name: string) => any;
export declare function getI18nValues(values: Record<string, unknown>, component: I18nElement): Record<string, unknown>;
export declare function getI18nUpdateStrategy(newKey: string, oldKey: string, newValues: Record<string, unknown>, oldValues: Record<string, unknown>): {
    values?: object;
    key?: string;
    update: boolean;
};
export {};