import type { Molecule } from 'openchemlib';
/**
 * Ensures that all atoms in the molecule have a unique mapNo.
 * Atoms that already have a mapNo keep it. Atoms without a mapNo
 * are assigned the next available number starting from 1.
 * Throws if the molecule contains duplicate mapNo values.
 * @param molecule - The molecule to process (modified in place)
 */
export declare function ensureMapNo(molecule: Molecule): void;
//# sourceMappingURL=ensureMapNo.d.ts.map