import { GraphJson } from './types';
/**
 * Options for GML serialization.
 */
export interface SerializeGmlOptions {
    /** Include creator comment */
    creator?: string;
    /** Indentation string (default: two spaces) */
    indent?: string;
    /** Use numeric IDs instead of labels */
    useNumericIds?: boolean;
}
/**
 * Serialize a graph JSON object to GML format.
 *
 * @param graph - Graph in normalized JSON format
 * @param options - Serialization options
 * @returns GML string
 */
export declare const serializeGml: (graph: GraphJson, options?: SerializeGmlOptions) => string;
//# sourceMappingURL=serialize.d.ts.map