/**
 * Tries its hardest to extract an error message from the input, which may be anything (not even an
 * Error instance).
 *
 * @category Error
 * @category Package : @augment-vir/common
 * @package [`@augment-vir/common`](https://www.npmjs.com/package/@augment-vir/common)
 */
export declare function extractErrorMessage(maybeError: unknown): string;
/**
 * Combines multiple error messages into a single error message.
 *
 * @category Error
 * @category Package : @augment-vir/common
 * @package [`@augment-vir/common`](https://www.npmjs.com/package/@augment-vir/common)
 */
export declare function combineErrorMessages(...rawMessages: ReadonlyArray<unknown>): string;