/**
 * Extensible equality algorithm used by all functions that check deep equality.
 * @internal
 *   Not exported itself, but it's exposed through validators. \
 *   Do not confuse with `isEqual` validator.
 * @see https://earljs.dev/docs/advanced/equality-algorithm
 */
export declare function isEqual(value: unknown, other: unknown, options?: import("./EqualityOptions").EqualityOptions): boolean;