import type { LanguageFn } from 'highlight.js';
/**
 * Syntax highlights a code string using the `rehype-highlight` library.
 */
export declare function syntaxHighlight(codeString: string, options: {
    lang: string;
    languages: Record<string, LanguageFn>;
    lineNumbers?: boolean;
    maskCredentials?: string | string[];
}): string;
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