import { TransformComponent as TC } from '../runtime';
import { NormalizeYTransform } from '../spec';
export type NormalizeYOptions = Omit<NormalizeYTransform, 'type'>;
/**
 * Group marks into series by specified channels, and then transform
 * each series's value, say to transform them relative to some basis
 * to apply a moving average.
 */
export declare const NormalizeY: TC<NormalizeYOptions>;