import { ɵCell } from '../grid-cell';
import { ɵBaseDirectionStrategy } from './base-direction.strategy';
/** @internal */
export declare class ɵVerticalDirectionStrategy<T> extends ɵBaseDirectionStrategy<T> {
    next(cell: ɵCell<T>): ɵCell<T>;
    nextWithoutData(cell: ɵCell<T>): ɵCell<T>;
    nextWithData(cell: ɵCell<T>): ɵCell<T>;
    previous(cell: ɵCell<T>): ɵCell<T>;
    previousWithoutData(cell: ɵCell<T>): ɵCell<T>;
    previousWithData(cell: ɵCell<T>): ɵCell<T>;
}