import { Dict } from "./util-types";
/**
 * Creates an object mapping the items of a collection by a property.
 *
 * @param arr collection of items to be indexed
 * @param path property path eg. "foo.bar", "foo[0]"
 */
export declare const indexBy: <T>(arr: T[], path: string) => Dict<T>;
/**
 * Decorator for a getter which assigns the result of first invocation of getter as
 * the equivalent property of the class
 */
export declare function MemoizeGetter(_target: any, propertyKey: string, descriptor: PropertyDescriptor): void;