import { TreeNodeRoot } from '../tree';
/**
 * Computes an index for each node in the tree.
 * This operation is idempotent: applying several times will not have further effects (but will cost resources as the whole tree will be traversed anyway).
 * @param rootNode The root node
 * @param noBackwardsReferencesIndex See {@link GedcomReadingOptions.noBackwardsReferencesIndex}
 * @param doHideIndex See {@link GedcomReadingOptions.doHideIndex}
 * @param progressCallback See {@link GedcomReadingOptions.progressCallback}
 * @category Gedcom parser
 */
export declare const indexTree: (rootNode: TreeNodeRoot, noBackwardsReferencesIndex?: boolean, doHideIndex?: boolean, progressCallback?: (() => void) | null) => void;