import type { PPTElement } from '../types/slides';
export type ElementOrderCommand = 'up' | 'down' | 'top' | 'bottom';
/**
 * Excel-style z-order: a group (or multi-selection) moves as one block,
 * keeping members' relative order. Neighboring groups are skipped as a unit.
 */
export declare function collectOrderUnitIds(elementList: PPTElement[], seedIds: string[]): string[];
export declare function orderElementList(elementList: PPTElement[], seedIds: string[], command: ElementOrderCommand): PPTElement[] | null;