/**
 * A utility function to assert that a value is never.
 * This is useful in TypeScript to ensure that all possible cases are handled in a switch statement or similar control flow.
 *
 * @throws An error if the function is ever called.
 * @param value The value that is expected to be of type `never`.
 * @param message An optional message or Error to throw.
 */
export declare function assertNever(value: never, message?: string | Error): never;