import AbstractStructure from './abstractStructure';
import BranchViewController from '../viewController/branchViewController';
import Bounds from '../utils/bounds';
import Size from '../utils/size';
import StructureClass from '../common/constants/structures';
export default class TimelineHorizontalDown extends AbstractStructure {
    calcAttachedChildrenPos(branch: BranchViewController, bounds: Bounds): void;
    protected getChildrenSize(branch: BranchViewController): Size;
    private _getExtendHeight;
    getChildStructure(): StructureClass;
}