/**
 * @file Cosmetic rule separator finder and categorizer.
 */
import { CosmeticRuleSeparator } from '../nodes/index.js';
export interface CosmeticRuleSeparatorFinderResult {
    /**
     * Separator type.
     */
    separator: CosmeticRuleSeparator;
    /**
     * Separator start position.
     */
    start: number;
    /**
     * Separator end position.
     */
    end: number;
}
/**
 * Utility class for cosmetic rule separators.
 */
export declare class CosmeticRuleSeparatorUtils {
    /**
     * Checks whether the specified separator is an exception.
     *
     * @param separator Separator to check.
     *
     * @returns `true` if the separator is an exception, `false` otherwise.
     */
    static isException(separator: CosmeticRuleSeparator): boolean;
    /**
     * Checks whether the specified separator is marks an Extended CSS cosmetic rule.
     *
     * @param separator Separator to check.
     *
     * @returns `true` if the separator is marks an Extended CSS cosmetic rule, `false` otherwise.
     */
    static isExtendedCssMarker(separator: CosmeticRuleSeparator): boolean;
    /**
     * Looks for the cosmetic rule separator in the rule. This is a simplified version that
     * masks the recursive function.
     *
     * @param rule Raw rule.
     *
     * @returns Separator result or null if no separator was found.
     */
    static find(rule: string): CosmeticRuleSeparatorFinderResult | null;
}