/**
 * Retrieves a value from a cache given a key. The compiler provides special
 * consideration for this call such that it is generally considered side-effect
 * free. However, if the `opt_keyFn` or `valueFn` have side-effects
 * then the entire call is considered to have side-effects.
 *
 * Conventionally storing the value on the cache would be considered a
 * side-effect and preclude unused calls from being pruned, ie. even if
 * the value was never used, it would still always be stored in the cache.
 *
 * Providing a side-effect free `valueFn` and `opt_keyFn`
 * allows unused calls to `cache` to be pruned.
 *
 * @param {!Object<K, V>} cacheObj The object that contains the cached values.
 * @param {?} key The key to lookup in the cache. If it is not string or number
 *     then a `opt_keyFn` should be provided. The key is also used as the
 *     parameter to the `valueFn`.
 * @param {function(?):V} valueFn The value provider to use to calculate the
 *     value to store in the cache. This function should be side-effect free
 *     to take advantage of the optimization.
 * @param {function(?):K=} opt_keyFn The key provider to determine the cache
 *     map key. This should be used if the given key is not a string or number.
 *     If not provided then the given key is used. This function should be
 *     side-effect free to take advantage of the optimization.
 * @return {V} The cached or calculated value.
 * @template K
 * @template V
 */
export function cache<K, V>(cacheObj: any, key: unknown, valueFn: (arg0: unknown) => V, opt_keyFn?: ((arg0: unknown) => K) | undefined): V;
/**
 * Check if a property can be accessed without throwing an exception.
 * @param {?Object} obj The owner of the property.
 * @param {string} prop The property name.
 * @return {boolean} Whether the property is accessible. Will also return true
 *     if obj is null.
 */
export function canAccessProperty(obj: any | null, prop: string): boolean;
/**
 * @license
 * Copyright The Closure Library Authors.
 * SPDX-License-Identifier: Apache-2.0
 */
/**
 * @fileoverview Useful compiler idioms.
 */
/**
 * Syntax for object literal casts.
 * @see http://go/jscompiler-renaming
 * @see https://goo.gl/CRs09P
 *
 * Use this if you have an object literal whose keys need to have the same names
 * as the properties of some class even after they are renamed by the compiler.
 *
 * @param {!Function} type Type to cast to.
 * @param {?Object} object Object literal to cast.
 * @return {?Object} The object literal.
 */
export function object(type: Function, object: any | null): any | null;
/**
 * Syntax for renaming property strings.
 * @see http://go/jscompiler-renaming
 * @see https://goo.gl/CRs09P
 *
 * Use this if you have an need to access a property as a string, but want
 * to also have the property renamed by the compiler. In contrast to
 * object, this method takes an instance of an object.
 *
 * Properties must be simple names (not qualified names).
 *
 * @param {string} prop Name of the property
 * @param {!Object} object Instance of the object whose type will be used
 *     for renaming
 * @return {string} The renamed property.
 */
export function objectProperty(prop: string, object: any): string;
/**
 * To assert to the compiler that an operation is needed when it would
 * otherwise be stripped. For example:
 * <code>
 *     // Force a layout
 *     sinkValue(dialog.offsetHeight);
 * </code>
 * @param {T} x
 * @return {T}
 * @template T
 */
export function sinkValue<T>(x: T): T;
export namespace sinkValue {
    function __(): void;
}