/** First balanced {...}; if none closes, first '{' to end; null if no '{'. */
export declare function locateJson(text: string | null | undefined): string | null;
/** Span of <root>...</root>; if close absent, opener to end; null if no opener. */
export declare function locateXml(text: string | null | undefined, rootName: string | null | undefined, caseInsensitive: boolean): string | null;
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