/**
 * Determines whether input is a Next.js not-found error.
 * https://beta.nextjs.org/docs/api-reference/notfound#notfound
 */
export declare function isNotFoundNavigationError(subject: unknown): boolean;
/**
 * Determines whether input is a Next.js redirect error.
 * https://beta.nextjs.org/docs/api-reference/redirect#redirect
 */
export declare function isRedirectNavigationError(subject: unknown): boolean;
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