/**
 * Returns the error message of the given error.
 *
 * @param error - The error from which to extract the error message.
 * @returns The extracted error message.
 */
export declare function getErrorMessage(error: unknown): string;
/**
 * Converts the given unknown error type to an explicit error type. If given error is already an instance of Error then it is returned unchanged.
 *
 * @param error - The error to convert to an Error instance.
 * @returns The error instance.
 */
export declare function toError(error: unknown): Error;