import type { CustomMatcher } from './customOperators.js';
export type StringOperator = (arg1: string[], arg2?: string) => (arg: string) => boolean;
export type StringMatcher = (value: string, path: string[]) => boolean | null;
export type DefaultStringMatcher = (value: string) => boolean;
/**
 * Builds the function which of a criterion which checks a leaf string value against the keyword.
 */
export default function getStringMatchers(keyword: string, insensitive: string, customOperators: CustomMatcher[]): StringMatcher[];
export declare function getDefaultStringMatcher(keyword: string, insensitive: string): (arg: string) => boolean;
/**
 * @internal
 */
export declare function splitStringOperator(keyword: string): {
    operator: string;
    values: string[];
};
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