import { TransformComponent as TC } from '../runtime';
import { StackYTransform } from '../spec';
export type StackYOptions = Omit<StackYTransform, 'type'>;
/**
 * The stack transform group marks into series by color channel,
 * and then produce new y channel for each series by specified order,
 * say to form vertical "stacks" by specified channels.
 */
export declare const StackY: TC<StackYOptions>;