import type { BaseErrorOptions } from './base.error';
import { BaseError } from './base.error';
export type UnexpectedErrorOptions = Omit<BaseErrorOptions, 'level'> & {
    level?: 'error' | 'fatal';
};
/**
 * Error that indicates something is wrong in the code: logic mistakes,
 * unhandled cases, assertions that fail. These are not recoverable and
 * should be brought to developers' attention.
 *
 * Default level: error
 */
export declare class UnexpectedError extends BaseError {
    constructor(message: string, opts?: UnexpectedErrorOptions);
}
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