import type { BracketOption, StatesMap } from './types';
export declare function isBracketKey(key: string): boolean;
export declare function isLeftKey(key: string): boolean;
export declare function isRightKey(key: string): boolean;
export declare function getCounterpartBracketKey(rightKey: string): string | undefined;
export declare function configBrackets(states: StatesMap, opts: BracketOption[]): StatesMap;
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